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Neuropore :: Neuropore (n.) An opening at either end of the embryonic neural canal.

Kenogenesis :: Kenogenesis (n.) Modified evolution, in which nonprimitive characters make their appearance in consequence of a secondary adaptation of the embryo to the peculiar conditions of its environment; -- distinguished from palingenesis..

Radicle :: Radicle (n.) The rudimentary stem of a plant which supports the cotyledons in the seed, and from which the root is developed downward; the stem of the embryo; the caulicle..

Endorhizous :: Endorhizous (a.) Having the radicle of the embryo sheathed by the cotyledon, through which the embryo bursts in germination, as in many monocotyledonous plants..

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..

Chondro- :: Chondro- () A combining form meaning a grain, granular, granular cartilage, cartilaginous; as, the chondrocranium, the cartilaginous skull of the lower vertebrates and of embryos..

Myoepithelial :: Myoepithelial (a.) Derived from epithelial cells and destined to become a part of the muscular system; -- applied to structural elements in certain embryonic forms.

Basipterygium :: Basipterygium (n.) A bar of cartilage at the base of the embryonic fins of some fishes. It develops into the metapterygium.

Blastema :: Blastema (n.) The structureless, protoplasmic tissue of the embryo; the primitive basis of an organ yet unformed, from which it grows..

Enterocoele :: Enterocoele (n.) A perivisceral cavity which arises as an outgrowth or outgrowths from the digestive tract; distinguished from a schizocoele, which arises by a splitting of the mesoblast of the embryo..

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..

Conceive :: Conceive (v. t.) To receive into the womb and begin to breed; to begin the formation of the embryo of.

Centripetal :: Centripetal (a.) Having the radicle turned toward the axis of the fruit, as some embryos..

Embryo :: Embryo (n.) The germ of the plant, which is inclosed in the seed and which is developed by germination..

Inembryonate :: Inembryonate (a.) Not embryonate.

Cicatricle :: Cicatricle (n.) The germinating point in the embryo of a seed; the point in the yolk of an egg at which development begins.

Homogeny :: Homogeny (n.) The correspondence of common descent; -- a term used to supersede homology by Lankester, who also used homoplasy to denote any superinduced correspondence of position and structure in parts embryonically distinct (other writers using the term homoplasmy). Thus, there is homogeny between the fore limb of a mammal and the wing of a bird; but the right and left ventricles of the heart in both are only in homoplasy with each other, these having arisen independently since the divergence

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

Proembryo :: Proembryo (n.) The series of cells formed in the ovule of a flowering plant after fertilization, but before the formation of the embryo..

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..

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