(1):

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

(2):

(a.) Pertaining to an embryo; rudimentary; undeveloped; as, an embryo bud.

(3):

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

(4):

(n.) The young of an animal in the womb, or more specifically, before its parts are developed and it becomes a fetus (see Fetus).