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Basisphenoidal :: Basisphenoidal (a.) Of or pertaining to that part of the base of the cranium between the basioccipital and the presphenoid, which usually ossifies separately in the embryo or in the young, and becomes a part of the sphenoid in the adult..

Planula :: Planula (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..

Embryonated :: Embryonated (a.) In the state of, or having, an embryonal..

Homosystemic :: Homosystemic (a.) Developing, in the case of multicellular organisms, from the same embryonic systems into which the secondary unit (gastrula or plant enbryo) differentiates..

Inembryonate :: Inembryonate (a.) Not embryonate.

Protocercal :: Protocercal (a.) Having a caudal fin extending around the end of the vertebral column, like that which is first formed in the embryo of fishes; diphycercal..

Metamorphosis :: Metamorphosis (n.) A change in the form or function of a living organism, by a natural process of growth or development; as, the metamorphosis of the yolk into the embryo, of a tadpole into a frog, or of a bud into a blossom. Especially, that form of sexual reproduction in which an embryo undergoes a series of marked changes of external form, as the chrysalis stage, pupa stage, etc., in insects. In these intermediate stages sexual reproduction is usually impossible, but they ultimately pass into

Cormogeny :: Cormogeny (n.) The embryological history of groups or families of individuals.

Pseudembryo :: Pseudembryo (n.) An asexual form from which the true embryo is produced by budding.

Chromoblast :: Chromoblast (n.) An embryonic cell which develops into a pigment cell.

Gastrulation :: Gastrulation (n.) The process of invagination, in embryonic development, by which a gastrula is formed..

Cotyledon :: Cotyledon (n.) A leaf borne by the caulicle or radicle of an embryo; a seed leaf.

Allantoidea :: Allantoidea (n. pl.) The division of Vertebrata in which the embryo develops an allantois. It includes reptiles, birds, and mammals..

Otocyst :: Otocyst (n.) An auditory cyst or vesicle; one of the simple auditory organs of many invertebrates, containing a fluid and otoliths; also, the embryonic vesicle from which the parts of the internal ear of vertebrates are developed..

Mesonephros :: Mesonephros (n.) The middle one of the three pairs of embryonic renal organs developed in most vertebrates; the Wolffian body.

Embryoniferous :: Embryoniferous (a.) Having an embryo.

Parthenogenesis :: Parthenogenesis (n.) The production of seed without fertilization, believed to occur through the nonsexual formation of an embryo extraneous to the embrionic vesicle..

Embryo :: Embryo (a.) Pertaining to an embryo; rudimentary; undeveloped; as, an embryo bud..

Coleorhiza :: Coleorhiza (n.) A sheath in the embryo of grasses, inclosing the caulicle..

Embryological :: Embryological (a.) Of or pertaining to embryology.

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