the ciliated larva of a cnidarian
Origin of planulaModern Latin ; from LL, little plane, diminutive ; from Classical Latin planus, flat: see plain
The flat, free-swimming, ciliated larva of a cnidarian.
Origin of planulaNew Latin planula, from Latin, feminine diminutive of planus, flat (from its shape); see pel&schwa;-2 in Indo-European roots.
- plan′u·lar, plan′u·late′
- (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.
Latin, a little plane.