phacoidadj.n.

Brit.

/ˈfakɔɪd/, U.S.

/ˈfæˌkɔɪd/

Origin: Formed within English, by derivation; modelled on a Greek lexical item. Etymons: phaco- comb. form, -oid suffix.

Etymology: < phaco- comb. form + -oid suffix, after ancient Greek ϕακοειδής having the shape of a lentil or lens, in Hellenistic Greek especially applied to the lens of the eye (also recorded as a Greek word in Latin context in Vesalius (1543)). With the adjective compare French phacoïde (H. Straus-Durckheim Anat. descr. et compar. du chat (1845) I. 521). With the noun compare slightly earlier phacoidal adj.

†A. adj.

Having the shape of a lentil or lens; lenticular. Obsolete. rare.Apparently only attested in dictionaries or glossaries.

ΚΠ

1858 R. G. Mayne Expos. Lexicon Med. Sci. (1860) 925/1 Phacoides, resembling a lentil in shape: phacoid.

B. n.

Geology. A lens-shaped body of distinct composition in a rock, esp. an inclusion of feldspar or quartz (cf. augen n.). Cf. phacoidal adj.

ΚΠ

1905 J. Geikie Structural & Field Geol. v. 77 Augen-gneiss (Eye-gneiss) with large eye-like kernels (phacoids) of quartz or orthoclase.

1930 B. N. Peach & J. Horne Chapters Geol. Scotl. 58 Flaser structure with abundant phacoids of felspar and hornblende.

2003 Jrnl. Structural Geol. 25 52/2 Thus flattening and formation of phacoids was probably early in the deformation history, while the sandstones were still not completely lithified.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	phacoid
释义	phacoidadj.n. Brit. /ˈfakɔɪd/, U.S. /ˈfæˌkɔɪd/ Origin: Formed within English, by derivation; modelled on a Greek lexical item. Etymons: phaco- comb. form, -oid suffix. Etymology: < phaco- comb. form + -oid suffix, after ancient Greek ϕακοειδής having the shape of a lentil or lens, in Hellenistic Greek especially applied to the lens of the eye (also recorded as a Greek word in Latin context in Vesalius (1543)). With the adjective compare French phacoïde (H. Straus-Durckheim Anat. descr. et compar. du chat (1845) I. 521). With the noun compare slightly earlier phacoidal adj. †A. adj. Having the shape of a lentil or lens; lenticular. Obsolete. rare.Apparently only attested in dictionaries or glossaries. ΚΠ 1858 R. G. Mayne Expos. Lexicon Med. Sci. (1860) 925/1 Phacoides, resembling a lentil in shape: phacoid. B. n. Geology. A lens-shaped body of distinct composition in a rock, esp. an inclusion of feldspar or quartz (cf. augen n.). Cf. phacoidal adj. ΚΠ 1905 J. Geikie Structural & Field Geol. v. 77 Augen-gneiss (Eye-gneiss) with large eye-like kernels (phacoids) of quartz or orthoclase. 1930 B. N. Peach & J. Horne Chapters Geol. Scotl. 58 Flaser structure with abundant phacoids of felspar and hornblende. 2003 Jrnl. Structural Geol. 25 52/2 Thus flattening and formation of phacoids was probably early in the deformation history, while the sandstones were still not completely lithified. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < adj.n.1858
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