1880, "without an amnion" (of amphibians and fishes); see an- (1) "not, without" + amniotic.
Entries linking to anamniotic
an- 1
privative prefix, from Greek an-, "not, without" (from PIE root *ne- "not"). The Greek prefix is a fuller form of the one represented in English by a- (3).
amniotic adj.
1822, from amnion + -ic, perhaps from or based on French amniotique. The form is irregular; a classically correct word would be *amniac.