Planula

Definition of Planula

Plan´u`la
n.1.(Biol.) 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.(Zool.) The very young, free-swimming larva of the cœlenterates. It usually has a flattened oval or oblong form, and is entirely covered with cilia.

Related Words

hydroid, hydrozoan
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Plantable
Plantage
Plantain
Plantain cutter
Plantain squirrel
Plantain tree
Plantal
Plantar
Plantation
Planted
Planter
Plantership
Planticle
Plantigrada
Plantigrade
Planting
Plantless
Plantlet
Plantocracy
Plantule
-Planula-
Planxty
Plaque
Plaquette
Plash
Plashet
Plashing
Plashoot
Plashy
Plasm
Plasma
Plasmatic
Plasmation
Plasmator
Plasmature
Plasmic
Plasmid
Plasmin
Plasmodial
Plasmodium
Plasmogen
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