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1808, from Modern Latin germinalis "in the germ," from Latin germen (genitive germinis) "sprout, bud, sprig, offshoot" (see germ) + -al (1).
germinal ger·mi·nal (jûr'mə-nəl)adj.
Of, relating to, or having the nature of a germ cell.
Of, relating to, or occurring in the earliest stage of development of an embryo or organism.