acroblast

Century Dictionary and Cyclopedia

1. n. In embryology, that portion of the embryonic germ-layers in vertebrates which gives rise to the blood and connective tissue; the mesenchyme.

Wiktionary

1. n. medicine Material derived from the Golgi apparatus from which the acrosome develops during spermatogenesis.
2. n. medicine (archaic) A type of embryonic cell forming a layer external to the mesoblast.