| 释义 |
invertebrate
invertebratewithout a backbone; without strength of character: She’s an invertebrate who will lie about anything to stay out of trouble.
Not to be confused with:inveterate – firmly established by long continuance, as a disease; chronic; settled or confirmed in a habit, practice, or feeling: He’s an inveterate runner.in·ver·te·brate I0215000 (ĭn-vûr′tə-brĭt, -brāt′)adj.1. Lacking a backbone or spinal column; not vertebrate.2. Of or relating to invertebrates: invertebrate zoology.n. An animal, such as an insect or mollusk, that lacks a backbone or spinal column.invertebrate (ɪnˈvɜːtɪbrɪt; -ˌbreɪt) n (Zoology) any animal lacking a backbone, including all species not classified as vertebratesadj (Zoology) of, relating to, or designating invertebratesin•ver•te•brate (ɪnˈvɜr tə brɪt, -ˌbreɪt)
adj. 1. a. without a backbone or spinal column; not vertebrate. b. of or pertaining to creatures without a backbone. 2. without strength of character. n. 3. an invertebrate animal. 4. a person who lacks strength of character. [1820–30; < New Latin] in•ver′te•bra•cy (-brə si) in•ver′te•brate•ness, n. in·ver·te·brate (ĭn-vûr′tə-brĭt, ĭn-vûr′tə-brāt′)Adjective Having no backbone or spinal column.Noun An animal, such as a coral, insect, or worm, that has no backbone. Most animals are invertebrates.invertebrate
An animal without a backbone, e.g. an earthworm, or locust.Thesaurus| Noun | 1. |  invertebrate - any animal lacking a backbone or notochord; the term is not used as a scientific classificationanimal, animate being, beast, creature, fauna, brute - a living organism characterized by voluntary movementarthropod - invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitinzoophyte - any of various invertebrate animals resembling a plant such as a sea anemone or coral or spongeparazoan, poriferan, sponge - primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile coloniescnidarian, coelenterate - radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa formscomb jelly, ctenophore - biradially symmetrical hermaphroditic solitary marine animals resembling jellyfishes having for locomotion eight rows of cilia arranged like teeth in a combworm - any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvaewoodborer, borer - any of various insects or larvae or mollusks that bore into woodrotifer - minute aquatic multicellular organisms having a ciliated wheel-like organ for feeding and locomotion; constituents of freshwater planktonmollusc, mollusk, shellfish - invertebrate having a soft unsegmented body usually enclosed in a shellphoronid - hermaphrodite wormlike animal living in mud of the sea bottombryozoan, moss animal, polyzoan, sea mat, sea moss - sessile aquatic animal forming mossy colonies of small polyps each having a curved or circular ridge bearing tentacles; attach to stones or seaweed and reproduce by buddingectoproct - sessile mossy aquatic animal having the anus of the polyp outside the crown of tentaclesentoproct - any of various moss-like aquatic animals usually forming branching colonies; each polyp having a both mouth and anus within a closed ring of tentaclesSymbion pandora - only known species of Cycliophora; lives symbiotically attached to a lobster's lip by an adhesive disk and feeding by means of a hairy mouth ring; its complex life cycle includes asexual and sexual phasesbrachiopod, lamp shell, lampshell - marine animal with bivalve shell having a pair of arms bearing tentacles for capturing food; found worldwidepeanut worm, sipunculid - small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanutechinoderm - marine invertebrates with tube feet and five-part radially symmetrical bodiesinvertebrate foot, foot - any of various organs of locomotion or attachment in invertebratesperistome - region around the mouth in various invertebratesexoskeleton - the exterior protective or supporting structure or shell of many animals (especially invertebrates) including bony or horny parts such as nails or scales or hoofs | | Adj. | 1. | invertebrate - lacking a backbone or spinal column; "worms are an example of invertebrate animals"spinelesszoological science, zoology - the branch of biology that studies animalsvertebrate - having a backbone or spinal column; "fishes and amphibians and reptiles and birds and mammals are verbetrate animals" |
invertebratenoun see crustaceans, snails, slugs and other gastropods, spiders and other arachnidsInvertebratesTypes of invertebrates amoeba or (U.S.) ameba, animalcule or animalculum, arrowworm, arthropod, bivalve, bladder worm, box jellyfish or (Austral.) sea wasp, brachiopod or lamp shell, brandling, bryozoan or (colloquial) sea mat, catworm, white worm, or white cat, centipede, chicken louse, chiton or coat-of-mail shell, clam, clappy-doo or clabby-doo (Scot.), cockle, cone (shell), coral, crown-of-thorns, ctenophore or comb jelly, cuttlefish or cuttle, daphnia, earthworm, eelworm, gaper, gapeworm, gastropod, Guinea worm, horseleech, jellyfish, lancelet or amphioxus, leech, liver fluke, lugworm, lug, or lobworm, lungworm, millipede, millepede, or milleped, mollusc, mussel, octopus or devilfish, otter shell, oyster, paddle worm, paper nautilus, nautilus, or argonaut, pearly nautilus, nautilus, or chambered nautilus, piddock, Portuguese man-of-war, quahog, hard-shell clam, hard-shell, or round clam, ragworm or (U.S.) clamworm, razor-shell or (U.S.) razor clam, red coral or precious coral, roundworm, sandworm, scallop, sea anemone, sea cucumber, sea lily, sea mouse, sea pen, sea slater, sea squirt, sea urchin, seed oyster, soft-shell (clam), sponge, squid, starfish, stomach worm, stony coral, sunstar, tapeworm, tardigrade or water bear, tellin, teredo or shipworm, trepang or bêche-de-mer, tube worm, tubifex, tusk shell or tooth shell, Venus's flower basket, Venus's-girdle, Venus shell, vinegar eel, vinegar worm, or eelworm, water louse or water slater, water measurer, water stick insect, wheatworm, whipworm, woodborer, wormExtinct invertebrates ammonite, belemnite, eurypterid, graptolite, trilobiteTranslationsinvertebrate (inˈvəːtibrət) adjective, noun (an animal eg a worm or insect) not having a backbone. 無脊椎的(動物) 无脊椎的（动物） invertebrate
invertebrate (ĭn'vûr`təbrət, –brāt'), any animal lacking a backbone. The invertebrates include the tunicatestunicate
, marine animal of the phylum Chordata, which also includes the vertebrates. The adult form of most tunicates (also called urochordates) shows no resemblance to vertebrate animals, but such a resemblance is evident in the larva.
..... Click the link for more information. and lanceletslancelet,
name for small, fishlike lower chordate (see Chordata), also called amphioxus; it shows many affinities with the vertebrates. There are about 30 lancelet species, most belonging to the genus Brachiostoma (formerly Amphioxus).
..... Click the link for more information. of phylum Chordata, as well as all animal phyla other than Chordata. The major invertebrate phyla include: the sponges (PoriferaPorifera
[Lat.,=pore bearer], animal phylum consisting of the organisms commonly called sponges. It is the only phylum of the animal subkingdom Parazoa and represents the least evolutionarily advanced group of the animal kingdom.
..... Click the link for more information. ), coelenterates (CnidariaCnidaria
or Coelenterata
, phylum of invertebrate animals comprising the sea anemones, corals, jellyfish, and hydroids. Cnidarians are radially symmetrical (see symmetry, biological).
..... Click the link for more information. ), echinoderms (EchinodermataEchinodermata
[Gr.,=spiny skin], phylum of exclusively marine bottom-dwelling invertebrates having external skeletons of calcareous plates just beneath the skin. The plates may be solidly fused together, as in sea urchins, loosely articulated to facilitate movement, as in sea
..... Click the link for more information. ), flatworms (PlatyhelminthesPlatyhelminthes
, phylum containing about 20,000 species of soft-bodied, bilaterally symmetrical, invertebrate animals, commonly called flatworms. There are four classes: the free-living, primarily aquatic class, Turbellaria, and Trematoda, Cestoda, and Monogenea, which are
..... Click the link for more information. ), roundworms (NematodaNematoda
, phylum consisting of about 12,000 known species, and many more predicted species, of worms (commonly known as roundworms or threadworms). Nematodes live in the soil and other terrestrial habitats as well as in freshwater and marine environments; some live on the deep
..... Click the link for more information. ), segmented worms (AnnelidaAnnelida
[Lat., anellus=a ring], phylum of soft-bodied, bilaterally symmetrical (see symmetry, biological), segmented animals, known as the segmented, or annelid, worms.
..... Click the link for more information. ), mollusks (MolluscaMollusca
, taxonomic name for the one of the largest phyla of invertebrate animals (Arthropoda is the largest) comprising more than 50,000 living mollusk species and about 35,000 fossil species dating back to the Cambrian period.
..... Click the link for more information. ), and arthropods (ArthropodaArthropoda
[Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct trilobites.
..... Click the link for more information. ). Invertebrates are tremendously diverse, ranging from microscopic wormlike mezozoans (see MezozoaMezozoa
, name of an animal subkingdom and also of the subkingdom's only phylum. The mezozoans are simple parasitic marine wormlike animals of only 20 to 30 cells, which are differentiated only into reproductive cells and ciliated cells.
..... Click the link for more information. ) to very large animals such as the giant squidsquid,
carnivorous marine cephalopod mollusk. The squid is one of the most highly developed invertebrates, well adapted to its active, predatory life. The characteristic molluscan shell is reduced to a horny plate shaped like a quill pen and buried under the mantle.
..... Click the link for more information. . Approximately 95% of all the earth's animal species are invertebrates; of these the vast majority are insectsinsect,
invertebrate animal of the class Insecta of the phylum Arthropoda. Like other arthropods, an insect has a hard outer covering, or exoskeleton, a segmented body, and jointed legs. Adult insects typically have wings and are the only flying invertebrates.
..... Click the link for more information. and other arthropods. Invertebrates are important as parasites and are essential elements of all ecological communities. Bibliography See A. Kaestner, Invertebrate Zoology (3 vol., 1967–70); R. D. Barnes, Invertebrate Zoology (5th ed. 1987); R. Buchsbaum et al., Animals without Backbones (3d ed. 1987). invertebrate[in′vərd·ə‚brət] (invertebrate zoology) An animal lacking a backbone and internal skeleton. invertebrate any animal lacking a backbone, including all species not classified as vertebrates invertebrate
invertebrate [in-ver´tĕ-brāt] 1. having no vertebral column.2. any animal that has no vertebral column.in·ver·te·brate (in-ver'tĕ-brāt), 1. Not possessed of a spinal or vertebral column. 2. Any animal that has no spinal column. invertebrate (ĭn-vûr′tə-brĭt, -brāt′)adj.1. Lacking a backbone or spinal column; not vertebrate.2. Of or relating to invertebrates: invertebrate zoology.n. An animal, such as an insect or mollusk, that lacks a backbone or spinal column.in·ver·te·brate (in-vĕr'tĕ-brăt) 1. Not possessed of a spinal or vertebral column. 2. (in-vĕr'tĕ-brāt) Any animal that has no spinal column. invertebrate any animal that does not possess a backbone.invertebrate
Synonyms for invertebratenoun any animal lacking a backbone or notochordRelated Words- animal
- animate being
- beast
- creature
- fauna
- brute
- arthropod
- zoophyte
- parazoan
- poriferan
- sponge
- cnidarian
- coelenterate
- comb jelly
- ctenophore
- worm
- woodborer
- borer
- rotifer
- mollusc
- mollusk
- shellfish
- phoronid
- bryozoan
- moss animal
- polyzoan
- sea mat
- sea moss
- ectoproct
- entoproct
- Symbion pandora
- brachiopod
- lamp shell
- lampshell
- peanut worm
- sipunculid
- echinoderm
- invertebrate foot
- foot
- peristome
- exoskeleton
adj lacking a backbone or spinal columnSynonymsRelated Words- zoological science
- zoology
Antonyms |