noun
: a thickening of the blastoderm in an early embryo of an insect or other arthropod on the underside of the egg that is destined to develop into the body of the embryo proper
noun
: a thickening of the blastoderm in an early embryo of an insect or other arthropod on the underside of the egg that is destined to develop into the body of the embryo proper
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012