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Monogenesis :: Monogenesis (n.) The direct development of an embryo, without metamorphosis, into an organism similar to the parent organism; -- opposed to metagenesis..

Polygeny :: Polygeny (n.) The theory that living organisms originate in cells or embryos of different kinds, instead of coming from a single cell; -- opposed to monogenesis..

Subzigomatic :: Subzonal (a.) Situated under a zone, or zona; -- applied to a membrane between the zona radiata and the umbilical vesicle in the mammal embryo..

Actinula :: Actinula (n. pl.) A kind of embryo of certain hydroids (Tubularia), having a stellate form..

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

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..

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

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..

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..

Seed :: Seed (n.) A ripened ovule, consisting of an embryo with one or more integuments, or coverings; as, an apple seed; a currant seed. By germination it produces a new plant..

Corcule :: Corcule (n.) The heart of the seed; the embryo or germ.

Embryo :: Embryo (n.) The first rudiments of an organism, whether animal or plant.

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

Archenteron :: Archenteron (n.) The primitive enteron or undifferentiated digestive sac of a gastrula or other embryo. See Illust. under Invagination.

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

Pseudofilaria :: Pseudofilaria (n.) One of the two elongated vibratile young formed by fission of the embryo during the development of certain Gregarinae.

Antitropous :: Antitropous (a.) At the extremity most remote from the hilum, as the embryo, or inverted with respect to the seed, as the radicle..

Stomp :: Stomodaeum (n.) The primitive mouth and esophagus of the embryo of annelids and arthropods.

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

Embryotic :: Embryotic (a.) Embryonic.

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