Actinozoan.

Brit.

/ˌaktɪnəˈzəʊə/, U.S.

/ˌæktənəˈzoʊə/

Origin: A borrowing from Latin. Etymon: Latin Actinozoa.

Etymology: < scientific Latin Actinozoa ( H.-M. D. de Blainville Man. d'actinologie (1834) 186) < actino- actino- comb. form + -zoa -zoa comb. form.In sense 2, reinterpreted in connection with the genus name Actinia (see actinia n.), as a term parallel to Hydrozoa n. (compare actiniform and hydriform).

Zoology. Now rare.

†1. With plural agreement. In the classification of de Blainville: a division of animals comprising those with a radially symmetrical body plan (cf. Radiata n.¹). Obsolete. rare.

ΚΠ

1837 Penny Cycl. IX. 262/2 De Blainville's Echinodermata are placed as his first class of Actinozoa, and are divided into three orders.

2. With plural agreement. A class of coelenterates including sea anemones and coral polyps (now more usually called Anthozoa).As originally conceived by Huxley, the group included also the Ctenophora. actinozoon n. has been used as the singular form.

ΘΚΠ

the world > animals > invertebrates > Radiata > [noun]

Actinozoa1855

1855 T. H. Huxley in Proc. Royal Inst. (1858) 2 83 Among the Mollusca there is absolutely no extinct ordinal type; nor among the Radiata (Actinozoa and Hydrozoa).

1858 T. H. Huxley in Notices Proc. Royal Inst. Great Brit. 2 193 Is it conceivable..that the innumerable varieties of..polyzoa, of actinozoa, and hydrozoa, are adaptations to as many different kinds of life, and consequently varying physiological necessities?

1872 H. A. Nicholson Man. Palæontol. 85 Of the living groups of the Actinozoa, the Ctenophora and the Sea-anemones from their absence of hard parts, are unknown in a fossil condition.

1946 H. Woods Palæontol. Invertebr. (ed. 8) 79 Anthozoa (Actinozoa). This Class includes the corals and sea-anemones. They differ from the Hydrozoa..in possessing an œsophageal tube of stomodœum, which is distinct from the cœlenteron, though opening into it.

2005 Tetrahedron 61 8910/1 The coelenterates, principally class Actinozoa, molluscs of the genus Aplysia, selected species of sponges..are the main marine sources.

This entry has been updated (OED Third Edition, November 2010; most recently modified version published online December 2021).

单词	actinozoa
释义	Actinozoan. Brit. /ˌaktɪnəˈzəʊə/, U.S. /ˌæktənəˈzoʊə/ Origin: A borrowing from Latin. Etymon: Latin Actinozoa. Etymology: < scientific Latin Actinozoa ( H.-M. D. de Blainville Man. d'actinologie (1834) 186) < actino- actino- comb. form + -zoa -zoa comb. form.In sense 2, reinterpreted in connection with the genus name Actinia (see actinia n.), as a term parallel to Hydrozoa n. (compare actiniform and hydriform). Zoology. Now rare. †1. With plural agreement. In the classification of de Blainville: a division of animals comprising those with a radially symmetrical body plan (cf. Radiata n.¹). Obsolete. rare. ΚΠ 1837 Penny Cycl. IX. 262/2 De Blainville's Echinodermata are placed as his first class of Actinozoa, and are divided into three orders. 2. With plural agreement. A class of coelenterates including sea anemones and coral polyps (now more usually called Anthozoa).As originally conceived by Huxley, the group included also the Ctenophora. actinozoon n. has been used as the singular form. ΘΚΠ the world > animals > invertebrates > Radiata > [noun] Actinozoa1855 1855 T. H. Huxley in Proc. Royal Inst. (1858) 2 83 Among the Mollusca there is absolutely no extinct ordinal type; nor among the Radiata (Actinozoa and Hydrozoa). 1858 T. H. Huxley in Notices Proc. Royal Inst. Great Brit. 2 193 Is it conceivable..that the innumerable varieties of..polyzoa, of actinozoa, and hydrozoa, are adaptations to as many different kinds of life, and consequently varying physiological necessities? 1872 H. A. Nicholson Man. Palæontol. 85 Of the living groups of the Actinozoa, the Ctenophora and the Sea-anemones from their absence of hard parts, are unknown in a fossil condition. 1946 H. Woods Palæontol. Invertebr. (ed. 8) 79 Anthozoa (Actinozoa). This Class includes the corals and sea-anemones. They differ from the Hydrozoa..in possessing an œsophageal tube of stomodœum, which is distinct from the cœlenteron, though opening into it. 2005 Tetrahedron 61 8910/1 The coelenterates, principally class Actinozoa, molluscs of the genus Aplysia, selected species of sponges..are the main marine sources. This entry has been updated (OED Third Edition, November 2010; most recently modified version published online December 2021). < n.1837
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