planula
(noun) the flat ciliated free-swimming larva of hydrozoan coelenterates
Source: WordNet® 3.1
planula (plural planulae)
(biology) In embryonic development, a vesicle filled with fluid, formed from the morula by the divergence of its cells in such a manner as to give rise to a central space, around which the cells arrange themselves as an envelope; an embryonic form intermediate between the morula and gastrula.
(zoology) The larva of a hydrozoan, which is free-swimming and covered in cilia.
Source: Wiktionary
Plan"u*la, n.; pl. Planulæ. Etym: [L., a little plane.]
1. (Biol.)
Definition: In embryonic development, a vesicle filled with fluid, formed from the morula by the divergence of its cells in such a manner as to give rise to a central space, around which the cells arrange themselves as an envelope; an embryonic form intermediate between the morula and gastrula. Sometimes used as synonymous with gastrula.
2. (Zoöl.)
Definition: The very young, free-swimming larva of the coelenterates. It usually has a flattened oval or oblong form, and is entirely covered with cilia.
Source: Webster’s Unabridged Dictionary 1913 Edition
24 September 2024
(adjective) of or relating to the rhythmic aspect of language or to the suprasegmental phonemes of pitch and stress and juncture and nasalization and voicing
Decaffeinated coffee is not caffeine-free. Studies from the National Institute of Health (US) have shown that virtually all decaf coffee types contain caffeine. A 236-ml (8-oz) cup of decaf coffee contains up to 7 mg of caffeine, whereas a regular cup provided 70-140 mg.
