Planula Definition

plănyə-lə
planulae
noun
The ciliated larva of a cnidarian.
Webster's New World

(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.

Wiktionary

Other Word Forms of Planula

Noun

Singular:
planula
Plural:
planulae

Origin of Planula

  • New Latin plānula from Latin feminine diminutive of plānus flat (from its shape) pelə-2 in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Latin, a little plane.

    From Wiktionary

Planula Sentence Examples

  • According to Wulfert [60] the primitive germ-cells of Gonothyraea can be distinguished soon after the fixation of the planula, appearing amongst the interstitial cells of the ectoderm.

  • If the embryo is set free as a free-swimming, so-called planula-larva, in the blastula, parenchymula, or gastrula stage, then a free actinula stage is not found; if, on the other hand, a free actinula occurs, then there is no free planula stage.

  • In Ieptolinae the embryonic development culminates in a polyp, which is usually formed by fixation of a planula (parenchymula), rarely by fixation of an actinula.

  • In some hydroids the founder-polyp, developed from a planula after fixation, throws out numerous outgrowths from the base to form the hydrorhiza; these outgrowths may be radially arranged so as to form by contact or coalescence a flat plate.

  • In Aeginopsis a planula is formed by multipolar immigration.

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Words Starting With

PPLPLA

Words Ending With

ALAULA

Unscrambles

planula

Words Starting With P and Ending With A

Starts With P & Ends With AStarts With PL & Ends With AStarts With P & Ends With LA

Word Length

7 Letter Words7 Letter Words Starting With P7 Letter Words Ending With A