[as if ad. Gr. *ἐμβολία, f. stem of ἐμβάλλειν to throw in. Fr. has embolie (Littré) = EMBOLISM 3.] = INVAGINATION: a. Surg. The name of a particular operation for hernia. b. Phys. The process of formation of the double-layered gastrula by involution of the wall of the single-layered segmented ovum.
1877. Huxley, Anat. Inv. Anim., xii. 682. Modification of the blastosphere by the process of invagination, or emboly. Ibid., 683. The various processes by which the gastrula or its equivalent are produced, are reducible to epiboly and emboly.
