Source : Webster's Revised Unabridged Dictionary (1913)

Amphiblastic \Am`phi*blas"tic\ ([a^]m`f[i^]*bl[a^]s"t[i^]k), a.
   [Gr. 'amfi` + blastiko`s tending to sprout.] (Biol.)
   Segmenting unequally; -- said of telolecithal ova with
   complete segmentation.