PLANULAE

PLANULA

planula

(noun) the flat ciliated free-swimming larva of hydrozoan coelenterates

Source: WordNet® 3.1


Noun

planulae

plural of planula

Source: Wiktionary


PLANULA

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



RESET




Word of the Day

24 April 2025

LININ

(noun) an obsolete term for the network of viscous material in the cell nucleus on which the chromatin granules were thought to be suspended


coffee icon

Coffee Trivia

In the 18th century, the Swedish government made coffee and its paraphernalia (including cups and dishes) illegal for its supposed ties to rebellious sentiment.

coffee icon