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Nasofrontal :: Nasofrontal (a.) Of or pertaining to the nose and the front of the head; as, the embryonic nasofrontal process which forms the anterior boundary of the mouth..

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

Ossein :: Ossein (n.) The organic basis of bone tissue; the residue after removal of the mineral matters from bone by dilute acid; in embryonic tissue, the substance in which the mineral salts are deposited to form bone; -- called also ostein. Chemically it is the same as collagen..

Embryology :: Embryology (n.) The science which relates to the formation and development of the embryo in animals and plants; a study of the gradual development of the ovum until it reaches the adult stage.

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

Somatic :: Somatic (a.) Of or pertaining to the wall of the body; somatopleuric; parietal; as, the somatic stalk of the yolk sac of an 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..

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..

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..

Uterus :: Uterus (n.) A receptacle, or pouch, connected with the oviducts of many invertebrates in which the eggs are retained until they hatch or until the embryos develop more or less. See Illust. of Hermaphrodite in Append..

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

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

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..

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

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

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

Metanephros :: Metanephros (n.) The most posterior of the three pairs of embryonic renal organs developed in many vertebrates.

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

Suspensoria :: Suspensor (n.) The cord which suspends the embryo; and which is attached to the radicle in the young state; the proembryo.

Tritovum :: Tritovum (n.) An embryonic insect which has twice cast its skin previous to hatching from the egg.

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