actinoidn.²

Brit.

/ˈaktᵻnɔɪd/, U.S.

/ˈæktəˌnɔɪd/

Origin: Formed within English, by derivation. Etymons: actinium n., -oid suffix.

Etymology: < actin- (in actinium n.) + -oid suffix. Compare earlier actinide n.

Chemistry.

= actinide n.

ΘΚΠ

the world > matter > chemistry > elements and compounds > metals > [noun] > groups > actinides

actinide1945

actinon1947

actinoid1958

1958 Science 22 Aug. 426/1 The analytical chemistry of the actinoids.

1960 Jrnl. Amer. Chem. Soc. 82 5526/1 It is suggested that lanthanoid is preferable to lanthanide because of the use of -ide for binary compounds; similarly, actinoid is preferable to actinide.

1989 tr. C. Elschenbroich & A. Salzer Organometallics xv. 363 In actinoid–C₈H₈ complexes..a considerable contribution from covalent interactions may be assumed.

2002 I. Bradbury et al. Sci. Princ. for Physical Geographers xv. 67 The elements in the lower row, which are termed the actinides or actinoids, belong to period 7, and are another subset of group 3 elements.

This is a new entry (OED Third Edition, November 2010; most recently modified version published online December 2021).

actinoidadj.n.¹

Brit.

/ˈaktᵻnɔɪd/, U.S.

/ˈæktəˌnɔɪd/

Origin: Formed within English, by derivation; modelled on a Latin lexical item. Etymons: actinia n., -oid suffix.

Etymology: < actin- (in actinia n.) + -oid suffix, after scientific Latin Actinoida, former group name ( J. D. Dana Zoophytes (1846) 16; later also Actinoidae, Actinoidea). Compare also scientific Latin actinoides (1814 as specific epithet).

Zoology. Now rare.

A. adj.

Designating polyps (corals and anemones) of a kind resembling or typified by the genus Actinia, having the internal cavity divided by radial partitions (formerly classified in a group Actinoida).The term has been applied to all corals and anemones (contrasted with hydroid; = class Anthozoa) or taken to exclude soft corals and sea pens (contrasted with alcyonoid; = subclass Zoantharia or Hexacorallia). Cf. Actinozoa n.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [adjective] > of or relating to the Anthozoa > belonging to order Zoantharia > relating to suborder Achnaria > radiated

actiniform1817

actinoid1846

1846 J. D. Dana U.S. Exploring Exped.: Zoophytes v. 88 Between the budding individuals in plants and the budding Actinoid polyp, there seems to be a less perfect resemblance.

1860 Actinolog. Brit. Introd. 22 The cnidæ, in the Actinoid Zoophytes, are not confined to one organ or set of organs.

1913 Biol. Bull. 25 271 The fimbriated edge shows as distinct short tentacles with grooves running down outside,..resembling a diminutive actinoid coral Fungia.

†B. n.¹

A polyp of this kind. Obsolete.

ΚΠ

1851 New Englander (New Haven, Connecticut) May 316 The class of Polyps is represented as comprised of two orders—the Hydroids and the Actinoids.

1875 Amer. Naturalist 9 218 The polypes are divided into (1), the Actinoids (Zoantharia) which..have an indefinite number of tentacles, and (2), the Halcyonoids, in which the tentacles are eight in number.

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

单词	actinoid
释义	actinoidn.² Brit. /ˈaktᵻnɔɪd/, U.S. /ˈæktəˌnɔɪd/ Origin: Formed within English, by derivation. Etymons: actinium n., -oid suffix. Etymology: < actin- (in actinium n.) + -oid suffix. Compare earlier actinide n. Chemistry. = actinide n. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > [noun] > groups > actinides actinide1945 actinon1947 actinoid1958 1958 Science 22 Aug. 426/1 The analytical chemistry of the actinoids. 1960 Jrnl. Amer. Chem. Soc. 82 5526/1 It is suggested that lanthanoid is preferable to lanthanide because of the use of -ide for binary compounds; similarly, actinoid is preferable to actinide. 1989 tr. C. Elschenbroich & A. Salzer Organometallics xv. 363 In actinoid–C₈H₈ complexes..a considerable contribution from covalent interactions may be assumed. 2002 I. Bradbury et al. Sci. Princ. for Physical Geographers xv. 67 The elements in the lower row, which are termed the actinides or actinoids, belong to period 7, and are another subset of group 3 elements. This is a new entry (OED Third Edition, November 2010; most recently modified version published online December 2021). actinoidadj.n.¹ Brit. /ˈaktᵻnɔɪd/, U.S. /ˈæktəˌnɔɪd/ Origin: Formed within English, by derivation; modelled on a Latin lexical item. Etymons: actinia n., -oid suffix. Etymology: < actin- (in actinia n.) + -oid suffix, after scientific Latin Actinoida, former group name ( J. D. Dana Zoophytes (1846) 16; later also Actinoidae, Actinoidea). Compare also scientific Latin actinoides (1814 as specific epithet). Zoology. Now rare. A. adj. Designating polyps (corals and anemones) of a kind resembling or typified by the genus Actinia, having the internal cavity divided by radial partitions (formerly classified in a group Actinoida).The term has been applied to all corals and anemones (contrasted with hydroid; = class Anthozoa) or taken to exclude soft corals and sea pens (contrasted with alcyonoid; = subclass Zoantharia or Hexacorallia). Cf. Actinozoa n. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [adjective] > of or relating to the Anthozoa > belonging to order Zoantharia > relating to suborder Achnaria > radiated actiniform1817 actinoid1846 1846 J. D. Dana U.S. Exploring Exped.: Zoophytes v. 88 Between the budding individuals in plants and the budding Actinoid polyp, there seems to be a less perfect resemblance. 1860 Actinolog. Brit. Introd. 22 The cnidæ, in the Actinoid Zoophytes, are not confined to one organ or set of organs. 1913 Biol. Bull. 25 271 The fimbriated edge shows as distinct short tentacles with grooves running down outside,..resembling a diminutive actinoid coral Fungia. †B. n.¹ A polyp of this kind. Obsolete. ΚΠ 1851 New Englander (New Haven, Connecticut) May 316 The class of Polyps is represented as comprised of two orders—the Hydroids and the Actinoids. 1875 Amer. Naturalist 9 218 The polypes are divided into (1), the Actinoids (Zoantharia) which..have an indefinite number of tentacles, and (2), the Halcyonoids, in which the tentacles are eight in number. This entry has been updated (OED Third Edition, November 2010; most recently modified version published online December 2021). < n.²1958adj.n.¹1846
随便看	shroudcloth shrouded shrouded in mystery shrouder shrouding shrouding board shrouding corner shrouding place shrouding sheet shrouding-plate shrouding-sheet shroudingplate shroudings shroudingsheet shroudknot shroudlaid shroudless shroudlike shroudmaker shroudmanufacturer shroudplait shroudplate shroudrags shrouds shroudstopper

actinoidn.2

actinoidadj.n.1

actinoidn.²

actinoidadj.n.¹