单词 | polyactinal |
释义 | > as lemmaspolyactinal polyactinal adj. Brit. /ˌpɒlɪakˈtʌɪnl/ , /ˌpɒlɪˈaktɪnl/ , U.S. /ˌpɑliˌækˈtaɪn(ə)l/ , /ˌpɑliˈæktən(ə)l/ Zoology (of a sponge spicule) having many rays; (of a sponge) having such spicules.ΚΠ 1890 Cent. Dict. XVI. 4599/2 Polyactinal, many-rayed; multiradiate; in sponges, polyact. 1967 Jrnl. Paleontol. 41 511 (title) A new polyactinal sponge from the Antelope Valley Formation (Ordovician) in the Toquima Range, Nevada. 1995 Biol. Jrnl. Linn. Soc. 55 1 The current differences in shape between both spicule types are considered the result of a divergent morphological evolution from an ancestral polyactinal corpuscle. < as lemmas |
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