10 letters · 17 points in Scrabble
noun the blastula of a placental mammal in which some differentiation of cells has occurred
originEtymology tree English blasto- Proto-Indo-European *(s)kewH-? Proto-Indo-European *ḱewh₁-der.? Ancient Greek κύω (kúō)? Ancient Greek κύστις (kústis)der. Late Latin cystisder. English cyst English blastocyst From blasto- + cyst.
Etymology from Wiktionary, CC BY-SA 3.0