ˈ ̷ ̷ ̷ ̷ˌdərm noun
( -s )
Etymology: German, from blast- + -derm
1. : a blastodisc after completion of cleavage and formation of the blastocoel
2. : the part of insect and certain other invertebrate embryos corresponding to the vertebrate blastoderm
• blas·to·dermatic or blas·to·dermic | ̷ ̷ ̷ ̷+ adjective