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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

Inembryonate :: Inembryonate (a.) Not embryonate.

Embryonary :: Embryonary (a.) Embryonic.

Brain :: Brain (n.) The whitish mass of soft matter (the center of the nervous system, and the seat of consciousness and volition) which is inclosed in the cartilaginous or bony cranium of vertebrate animals. It is simply the anterior termination of the spinal cord, and is developed from three embryonic vesicles, whose cavities are connected with the central canal of the cord; the cavities of the vesicles become the central cavities, or ventricles, and the walls thicken unequally and become the three seg

Protoconch :: Protoconch (n.) The embryonic shell, or first chamber, of ammonites and other cephalopods..

Rudimentary :: Rudimentary (a.) Very imperfectly developed; in an early stage of development; embryonic.

Undifferentiated :: Undifferentiated (a.) Not differentiated; specifically (Biol.), homogenous, or nearly so; -- said especially of young or embryonic tissues which have not yet undergone differentiation (see Differentiation, 3), that is, which show no visible separation into their different structural parts..

Embryonate :: Embryonate (a.) Alt. of Embryonate.

Oospere :: Oospere (n.) An analogous mass of protoplasm in the ovule of a flowering plant; an embryonic vesicle.

Protozoonite :: Protozoonite (n.) One of the primary, or first-formed, segments of an embryonic arthropod..

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..

Embryon :: Embryon (n. & a.) See Embryo.

Embryous :: Embryous (a.) Embryonic; undeveloped.

Myotome :: Myotome (n.) One of the embryonic muscular segments arising from the protovertebrae; also, one of the protovertebrae themselves..

Development :: Development (n.) The series of changes which animal and vegetable organisms undergo in their passage from the embryonic state to maturity, from a lower to a higher state of organization..

Embryonal :: Embryonal (a.) Pertaining to an embryo, or the initial state of any organ; embryonic..

Embryonic :: Embryonic (a.) Of or pertaining to an embryo; embryonal; rudimentary.

Germogen :: Germogen (n.) The primitive cell in certain embryonic forms.

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

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

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