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Embryonic; undeveloped. [R.]

Not embryonate.

The condition of an ovule having but a single embryo. -- Mon*em`bry*on"ic, a.

Consisting of, or having, several embryos; polyembryonic.

Polyembryonate.

The production of two or more embryos in one seed, due either to the existence and fertilization of more than one embryonic sac or to the origination of embryos outside of the embryonic sac.

ed in the ovule of a flowering plant after fertilization, but before the formation of the embryo.

A false embryo.

A kind of embryo of certain hydroids (Tubularia), having a stellate form.

stored up within the integuments of the seed in many plants, but not incorporated in the embryo. It is the floury part in corn, wheat, and like grains, the oily part in poppy seeds, the fleshy part in the cocoanut, etc.

The division of Vertebrata in which the embryo develops an allantois. It includes reptiles, birds, and mammals.

A membranous appendage of the embryos of mammals, birds, and reptiles, -- in mammals serving to connect the fetus with the parent; the urinary vesicle.

A thin membrane surrounding the embryos of mammals, birds, and reptiles.

That group of vertebrates which develops in its embryonic life the envelope called the amnion. It comprises the reptiles, the birds, and the mammals.

At the extremity most remote from the hilum, as the embryo, or inverted with respect to the seed, as the radicle. Lindley.

The primitive enteron or undifferentiated digestive sac of a gastrula or other embryo. See Illust. under Invagination.

Situated in the axis of anything; as an embryo which lies in the axis of a seed. Gray.

A bar of cartilage at the base of the embryonic fins of some fishes. It develops into the metapterygium. -- Ba*sip`ter*yg"i*al (, a.

m 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.

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