| 释义 |
perennial
per·en·ni·al P0186600 (pə-rĕn′ē-əl)adj.1. a. Lasting an indefinitely long time; enduring: an author's perennial popularity among children.b. Appearing again and again or year after year; recurrent: a perennial contender for the championship. See Synonyms at continual.2. Botany Living three or more years.3. Lasting or active throughout the year: a perennial stream.n.1. Botany A perennial plant.2. Something that recurs or seems to recur on a yearly or continual basis: "that hardy perennial, the budget deficit" (David S. Broder).
[Latin perennis (per-, throughout; see per- + annus, year; see at- in Indo-European roots) + -al.]
per·en′ni·al·ly adv.perennial (pəˈrɛnɪəl) adj1. lasting throughout the year or through many years2. everlasting; perpetualn (Horticulture) a woody or herbaceous plant that can continue its growth for at least two years. Compare annual3, biennial3[C17: from Latin perennis continual, from per through + annus year] perˈennially advper•en•ni•al (pəˈrɛn i əl)
adj. 1. lasting for an indefinitely long time; enduring. 2. (of plants) having a life cycle lasting more than two years. 3. lasting or continuing throughout the entire year, as a stream. 4. perpetual; recurrent. n. 5. a perennial plant. 6. something that is continuing or recurrent. [1635–45; < Latin perenni(s) lasting the whole year through (per- per- + -enn-, comb. form of annus year + -is adj. suffix) + -al1] per•en`ni•al′i•ty, n. per•en′ni•al•ly, adv. per·en·ni·al (pə-rĕn′ē-əl) Botany Adjective Living for three or more years.Noun A perennial plant. Asters, irises, and peonies are some examples of perennials.perennial - First meant "remaining leafy throughout the year"; plants living three or more years—dying aboveground and sending up fresh growth every year—are perennials.See also related terms for sending.perennial1. A plant that lives for several years, e.g. oak.2. Any plant that lives for three or more years. There are two types: woody perennials, such as trees and shrubs; and herbaceous perennials, which do not have any woody stems above ground.Thesaurus| Noun | 1. |  perennial - (botany) a plant lasting for three seasons or moreplant life, flora, plant - (botany) a living organism lacking the power of locomotionphytology, botany - the branch of biology that studies plantsbutton snakeroot, Eryngium yuccifolium, rattlesnake master, rattlesnake's master - coarse prickly perennial eryngo of United States thought to cure rattlesnake bite | | Adj. | 1. | perennial - lasting three seasons or more; "the common buttercup is a popular perennial plant"phytology, botany - the branch of biology that studies plantsannual, one-year - completing its life cycle within a year; "a border of annual flowering plants"biennial, two-year - having a life cycle lasting two seasons; "a biennial life cycle"; "parsnips and carrots are biennial plants often grown as annuals" | | 2. | perennial - lasting an indefinitely long time; suggesting self-renewal; "perennial happiness"long - primarily temporal sense; being or indicating a relatively great or greater than average duration or passage of time or a duration as specified; "a long life"; "a long boring speech"; "a long time"; "a long friendship"; "a long game"; "long ago"; "an hour long" | | 3. | perennial - recurring again and again; "perennial efforts to stipulate the requirements"recurrent, repeatedcontinual - occurring without interruption; chiefly restricted to what recurs regularly or frequently in a prolonged and closely spaced series; "the continual banging of the shutters" |
perennialadjective continual, lasting, continuing, permanent, constant, enduring, chronic, persistent, abiding, lifelong, perpetual, recurrent, never-ending, incessant, unchanging, inveterate the perennial urban problems of drugs and homelessnessperennialadjectiveExisting or remaining in the same state for an indefinitely long time:abiding, continuing, durable, enduring, lasting, long-lasting, long-lived, long-standing, old, perdurable, permanent, persistent.Translationsperennial (pəˈreniəl) noun, adjective (a plant) which lasts for more than two years. Daffodils are perennial plants; They are perennials. (植物)多年生的 多年生植物（的）
perennial
perennial, any plant that under natural conditions lives for several to many growing seasons, as contrasted to an annualannual,
plant that germinates from seed, blossoms, produces seed, and dies within one year. Annuals propagate themselves by seed only, unlike many biennials and perennials. They are thus especially suited to environments that have a short growing season.
..... Click the link for more information. or a biennialbiennial,
plant requiring two years to complete its life cycle, as distinguished from an annual or a perennial. In the first year a biennial usually produces a rosette of leaves (e.g., the cabbage) and a fleshy root, which acts as a food reserve over the winter.
..... Click the link for more information. . Botanically, the term perennial applies to both woody and herbaceous plants (see stemstem,
supporting structure of a plant, serving also to conduct and to store food materials. The stems of herbaceous and of woody plants differ: those of herbaceous plants are usually green and pliant and are covered by a thin epidermis instead of by the bark of woody plants.
..... Click the link for more information. ) and thus includes numerous members of the kingdom. In horticulture, however, the term is usually restricted to hardy herbaceous perennials, particularly border plants such as alyssum, chrysanthemum, iris, peony, phlox, pink, and sedum, all of which characteristically die down to the ground each year and survive the winter on food stored in specialized underground stems (corms, rhizomes, and tubers in horticulture; bulbous plants are not considered perennials). Perennials form seeds each year after reaching maturity, but since plants grown from seeds do not normally bloom until the second season (unless forced), most garden perennials are propagated by dividing the rootstocks (see propagation of plantspropagation of plants
is effected in nature chiefly sexually by the seed and the spore, less often by rhizomes and other methods (see reproduction). Vegetative means include cutting, layering, grafting, tissue culture, and division of the roots (see perennial) and of the tubers
..... Click the link for more information. ). In fact, division every few years—as well as judicious pruning—is usually necessary to prevent the plant's becoming straggly and weak. Perennials, including the woody perennials, may have a rest period of some duration during their life cycle. In the plant different parts rest at different times and resume growth independently, e.g., the buds of deciduous plants, which form in late summer and remain dormant until spring. Even in tropical areas where plants appear to retain their leaves the year round, some plants lose all their leaves for a brief period and others grow new and drop old leaves on a continuing basis, as do most conifers. Bibliography See R. W. Cumming and R. E. Lee, Contemporary Perennials (1960); J. U. Crockett, Perennials (1972); A. M. Armitage, Herbaceous Perennial Plants (1989); R. R. Clausen and N. H. Ekstrom, Perennials for American Gardens (1989); P. J. Harper, Designing with Perennials (991). perennial[pə′ren·ē·əl] (botany) A plant that lives for an indefinite period, dying back seasonally and producing new growth from a perennating part. perennialA plant or shrub whose life cycle is greater than 2 years.perennial a woody or herbaceous plant that can continue its growth for at least two years perennial
perennial a plant that lives from year to year in a form other than seed. Plants with woody stems are generally perennials (e.g. trees, shrubs and woody vines), but so too are many herbaceous plants (e.g. dandelion, daisy and plantain), in which the aerial parts die back during the winter leaving perennating organs (e.g. tubers, corms and bulbs) underground.PerennialPresent at all seasons of the year.Mentioned in: Corticosteroids, Inhaledperennial
Related to perennial: perennial ryegrass, Perennial philosophySynonyms for perennialadj continualSynonyms- continual
- lasting
- continuing
- permanent
- constant
- enduring
- chronic
- persistent
- abiding
- lifelong
- perpetual
- recurrent
- never-ending
- incessant
- unchanging
- inveterate
Synonyms for perennialadj existing or remaining in the same state for an indefinitely long timeSynonyms- abiding
- continuing
- durable
- enduring
- lasting
- long-lasting
- long-lived
- long-standing
- old
- perdurable
- permanent
- persistent
Synonyms for perennialnoun (botany) a plant lasting for three seasons or moreRelated Words- plant life
- flora
- plant
- phytology
- botany
- button snakeroot
- Eryngium yuccifolium
- rattlesnake master
- rattlesnake's master
adj lasting three seasons or moreRelated WordsAntonyms- annual
- one-year
- biennial
- two-year
adj lasting an indefinitely long timeRelated Wordsadj recurring again and againSynonymsRelated Words |