anamniotic
/ˌænəˈmɪnɒtɪk/Definitions
1. adjective
Not having a true bladder or a bladder-like structure in the embryonic stage.
“The anamniotic eggs of turtles are an adaptation to their aquatic environment.”
2. noun
A type of egg-laying organism that does not have a true bladder or bladder-like structure in its embryonic stage.
“The anamniotic eggs of reptiles are protected by a hard shell.”