单词 | microstome |
释义 | > as lemmasmicrostome microstome n. Brit. /ˈmʌɪkrə(ʊ)stəʊm/ , U.S. /ˈmaɪkrəˌstoʊm/ †(a) Botany the small opening of the capsule of certain mosses (rare); (b) Zoology a form of certain ciliate protozoans of the genus Tetrahymena that has a small oral apparatus and feeds on bacteria (frequently attributive).Sense (a) is apparently only attested in dictionaries or glossaries.ΚΠ 1890 Cent. Dict. Microstome, in bot., a small mouth or orifice, as that belonging to the capsule of certain mosses. 1953 Parasitology 43 57/2 The additional terms macrostome form and microstome form will be employed for the two extreme stages when dimorphism is exhibited. 1983 Philos. Trans. (Royal Soc.) B. 301 359 The free-living species T. patula, T. vorax and T. paravorax..possess both macrostome and microstome forms. < as lemmas |
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