monactn.adj.

Brit.

/ˈmɒnakt/, U.S.

/ˈmɑnækt/

Origin: Formed within English, by clipping or shortening. Etymon: monactine adj.

Etymology: Shortened < monactine adj. Compare earlier tetract adj., triact adj. at tri- comb. form 1a(a), hexact adj. and n. at hexa- comb. form , polyact adj. at poly- comb. form 1.

Zoology. Now rare.

A. n.

= monactine n.

ΚΠ

1887 A. Thomson tr. F. E. Schulze in Rep. Sci. Results Voy. H.M.S. Challenger: Zool. XXI. 29 In our survey of the different forms of spicules which occur in the Hexactinellida, it will be convenient to divide them into six main groups, according to the number of perfectly developed rays. These six forms may be termed Hexacts, Pentacts, Tetracts, Triacts, Diacts, and Monacts.

1920 Smithsonian Misc. Coll. 67 289 A few minute monacts are visible towards the lower end of the specimen.

B. adj.

= monactinal adj.

ΘΚΠ

the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [adjective] > relating to a sponge > of parts of sponge > having one ray

monact1887

monactinal1887

monactine1887

1887 A. Thomson tr. F. E. Schulze in Rep. Sci. Results Voy. H.M.S. Challenger: Zool. XXI. 37 The derived nature of a monact spicule is in many cases determinable by the presence of rudimentary abortive rays.

1976 Philos. Trans. (Royal Soc.) B. 275 363 They [sc. crystals in a marine protozoan] behave quite like the straight monact spicules of calcareous sponges, which consist of single crystals of magnesian calcite.

This entry has been updated (OED Third Edition, September 2002; most recently modified version published online March 2022).

单词	monact
释义	monactn.adj. Brit. /ˈmɒnakt/, U.S. /ˈmɑnækt/ Origin: Formed within English, by clipping or shortening. Etymon: monactine adj. Etymology: Shortened < monactine adj. Compare earlier tetract adj., triact adj. at tri- comb. form 1a(a), hexact adj. and n. at hexa- comb. form , polyact adj. at poly- comb. form 1. Zoology. Now rare. A. n. = monactine n. ΚΠ 1887 A. Thomson tr. F. E. Schulze in Rep. Sci. Results Voy. H.M.S. Challenger: Zool. XXI. 29 In our survey of the different forms of spicules which occur in the Hexactinellida, it will be convenient to divide them into six main groups, according to the number of perfectly developed rays. These six forms may be termed Hexacts, Pentacts, Tetracts, Triacts, Diacts, and Monacts. 1920 Smithsonian Misc. Coll. 67 289 A few minute monacts are visible towards the lower end of the specimen. B. adj. = monactinal adj. ΘΚΠ the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [adjective] > relating to a sponge > of parts of sponge > having one ray monact1887 monactinal1887 monactine1887 1887 A. Thomson tr. F. E. Schulze in Rep. Sci. Results Voy. H.M.S. Challenger: Zool. XXI. 37 The derived nature of a monact spicule is in many cases determinable by the presence of rudimentary abortive rays. 1976 Philos. Trans. (Royal Soc.) B. 275 363 They [sc. crystals in a marine protozoan] behave quite like the straight monact spicules of calcareous sponges, which consist of single crystals of magnesian calcite. This entry has been updated (OED Third Edition, September 2002; most recently modified version published online March 2022). < n.adj.1887
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