Why was "tantrum" trending last week?
1849, Modern Latin, from Greek blastema "offspring, offshoot," from stem of blastanein "to shoot forth," from blastos "sprout, germ," of unknown origin. Related: Blastemal.
blastema blas·te·ma (blā-stē'mə)
The formative, undifferentiated material from which cells are formed.
A mass of embryonic cells from which an organ or a body part develops, either in normal development or in the regeneration of a lost body part.