Rhizocephalan.

Brit.

/ˌrʌɪzə(ʊ)ˈsɛfələ/,

/ˌrʌɪzə(ʊ)ˈsɛfl̩ə/,

/ˌrʌɪzə(ʊ)ˈkɛfələ/,

/ˌrʌɪzə(ʊ)ˈkɛfl̩ə/, U.S.

/ˌraɪzəˈsɛfələ/,

/ˌraɪzoʊˈsɛfələ/

Origin: A borrowing from Latin. Etymon: Latin Rhizocephala=.

Etymology: < scientific Latin Rhizocephala, order name (F. Müller 1862, in Archiv für Naturgeschichte 28 1) < rhizo- rhizo- comb. form + ancient Greek κεϕαλή head (see cephalo- comb. form) + scientific Latin -a -a suffix². Compare Hellenistic Greek ῥιζοκέϕαλος (of plants) having a bulbous root.

Zoology.

With plural agreement. An order of cirripede crustaceans (barnacles) which are highly specialized parasites of decapod crustaceans, having most adult organs reduced or absent, and sending rootlike absorptive processes into the host's body; (also rhizocephala) crustaceans of this order (collectively or individually).Rhizocephala, esp. of the genus Sacculina, are sometimes seen protruding from the underside of a crab.

ΚΠ

1862 Zoologist 20 8202 Dr. Fritz Müller describes parasites of crabs, to which he gives the name of Rhizocephala (root-headed).

1899 J. A. Thomson Outl. Zool. (ed. 3) xiii. 279 The hosts, e.g. crabs, infested by Rhizocephala, are sometimes materially affected, and even rendered incapable of reproducing.

1940 G. S. Carter Gen. Zool. Invertebr. xxii. 450 Only where we know nothing of the evolutionary history of parasitic animals..can their descent from free-living, or occasionally sessile (Rhizocephala), forms be doubted.

1974 Molecular Biol. 48 346 The barnacles, and particularly the parasitic Rhizocephala, show an extreme degree of specialized adaptations in comparison to the primitive crustacean body shape.

2000 Jrnl. Crustacean Biol. 20 385/1 Three orders of Cirripedia are generally recognized, Acrothoracica, Thoracica, and Rhizocephala.

Derivatives

rhizoˈcephalous adj. now rare = rhizocephalan adj.

ΚΠ

1875 Pop. Sci. Rev. 14 405 Mr. Darwin instances as remarkable a fact in the Animal Kingdom by pointing to those peculiar rhizocephalous crustaceans which are absolutely destitute of an alimentary canal.

1922 Ann. Rep. Board of Regents Smithsonian Inst. 1920 407 When a rhizocephalous crustacean finally shows the asexual reproduction,..can it be imagined that this final stage was a predestined evolution?

1959 Nature 14 Feb. 480/2 A discussion of the various theories of the influence of the Rhizocephalous parasite on the host.

This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).

单词	rhizocephala
释义	Rhizocephalan. Brit. /ˌrʌɪzə(ʊ)ˈsɛfələ/, /ˌrʌɪzə(ʊ)ˈsɛfl̩ə/, /ˌrʌɪzə(ʊ)ˈkɛfələ/, /ˌrʌɪzə(ʊ)ˈkɛfl̩ə/, U.S. /ˌraɪzəˈsɛfələ/, /ˌraɪzoʊˈsɛfələ/ Origin: A borrowing from Latin. Etymon: Latin Rhizocephala=. Etymology: < scientific Latin Rhizocephala, order name (F. Müller 1862, in Archiv für Naturgeschichte 28 1) < rhizo- rhizo- comb. form + ancient Greek κεϕαλή head (see cephalo- comb. form) + scientific Latin -a -a suffix². Compare Hellenistic Greek ῥιζοκέϕαλος (of plants) having a bulbous root. Zoology. With plural agreement. An order of cirripede crustaceans (barnacles) which are highly specialized parasites of decapod crustaceans, having most adult organs reduced or absent, and sending rootlike absorptive processes into the host's body; (also rhizocephala) crustaceans of this order (collectively or individually).Rhizocephala, esp. of the genus Sacculina, are sometimes seen protruding from the underside of a crab. ΚΠ 1862 Zoologist 20 8202 Dr. Fritz Müller describes parasites of crabs, to which he gives the name of Rhizocephala (root-headed). 1899 J. A. Thomson Outl. Zool. (ed. 3) xiii. 279 The hosts, e.g. crabs, infested by Rhizocephala, are sometimes materially affected, and even rendered incapable of reproducing. 1940 G. S. Carter Gen. Zool. Invertebr. xxii. 450 Only where we know nothing of the evolutionary history of parasitic animals..can their descent from free-living, or occasionally sessile (Rhizocephala), forms be doubted. 1974 Molecular Biol. 48 346 The barnacles, and particularly the parasitic Rhizocephala, show an extreme degree of specialized adaptations in comparison to the primitive crustacean body shape. 2000 Jrnl. Crustacean Biol. 20 385/1 Three orders of Cirripedia are generally recognized, Acrothoracica, Thoracica, and Rhizocephala. Derivatives rhizoˈcephalous adj. now rare = rhizocephalan adj. ΚΠ 1875 Pop. Sci. Rev. 14 405 Mr. Darwin instances as remarkable a fact in the Animal Kingdom by pointing to those peculiar rhizocephalous crustaceans which are absolutely destitute of an alimentary canal. 1922 Ann. Rep. Board of Regents Smithsonian Inst. 1920 407 When a rhizocephalous crustacean finally shows the asexual reproduction,..can it be imagined that this final stage was a predestined evolution? 1959 Nature 14 Feb. 480/2 A discussion of the various theories of the influence of the Rhizocephalous parasite on the host. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < n.1862
随便看	overlogical overlong overlook overlook bean overlook pea overlooked overlooker overlookers overlooking overlooks overloose overlop overlope overlord overlorded overlording overlords overlordship overlordships overloud overloudly overloudness overloup overlove ovoid