O″vism (?), n. [Ovum + -ism.] (Zoöl.) The old theory that the egg contains the whole embryo of the future organism and the germs of all subsequent offsprings and is merely awakened to activity by the spermatozoön; — opposed to spermism or animalculism.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.