Definition of "tachyblastic"

Little variation could be found in the size of the tachyblastic eggs produced by the members of any one clone, but some variation may occur from one clone to another.

1949, Transactions of the American Microscopical Society, page 7

In growing cultures most gastrotrichs produce only tachyblastic eggs.

Ellsworth C. Dougherty, The Lower Metazoa (page 474)

Opsiblastic eggs are thick-shelled, a little larger than tachyblastic eggs, and are very resistant to freezing and drying.

2010, James H. Thorp, Alan P. Covich, Ecology and Classification of North American Freshwater Invertebrates, page 167