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Definition of Planula
1. Noun. The flat ciliated free-swimming larva of hydrozoan coelenterates.
Definition of Planula
1. n. 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.
Definition of Planula
1. Noun. (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. ¹
2. Noun. (zoology) The larva of a hydrozoan, which is free-swimming and covered in cilia. ¹
¹ Source: wiktionary.com
Definition of Planula
1. the free-swimming larva of certain organisms [n -LAE] : PLANULAR [adj]
Medical Definition of Planula
1.
Origin: L, a little plane.
1.
Lexicographical Neighbors of Planula
Literary usage of Planula
Below you will find example usage of this term as found in modern and/or classical literature:
1. Proceedings of the American Association for the Advancement of Science by American Association for the Advancement of Science (1883)
"The special point to which the author wished to call attention is the fact that
the cilia are developed before the planula bursts forth from the ..."
2. Summarized Proceedings ... and a Directory of Members by American Association for the Advancement of Science (1883)
"The special point to which the author wished to call attention is the fact that
the cilia are developed before the planula bursts forth from the ..."
3. Seaside Studies in Natural History by Elizabeth Cabot Cary Agassiz, Alexander Agassiz (1871)
"... many of the fixed Hydroids, is perhaps more striking when we compare the
earlier stages of their growth. Suppose, for instance, that the planula of our ..."
4. Proceedings of the American Association for the Advancement of Science by American Association for the Advancement of Science (1883)
"The special point to which the author wished to call attention is the fact that
the cilia are developed before the planula bursts forth from the ..."
5. Summarized Proceedings ... and a Directory of Members by American Association for the Advancement of Science (1883)
"The special point to which the author wished to call attention is the fact that
the cilia are developed before the planula bursts forth from the ..."
6. Seaside Studies in Natural History by Elizabeth Cabot Cary Agassiz, Alexander Agassiz (1871)
"... many of the fixed Hydroids, is perhaps more striking when we compare the
earlier stages of their growth. Suppose, for instance, that the planula of our ..."
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