(biology, of an ovum) Tending to segment uniformly, and having little or no yolk embedded in the protoplasm.
1880-1881, Francis Maitland Balfour, A Treatise on Comparative Embryology
It is convenient to distinguish the ova which segment uniformly by some term ; and I should propose for this the term alecithal, as implying that they are without food-yolk or […] little