blastoneuropore
noun
blas·to·neu·ro·pore
| \ ˌblas-tō-ˈn(y)u̇r-ō-ˌpō(ə)r, -ˌpȯ(ə)r
\
\
Medical Definition of blastoneuropore
: a temporary opening formed by the union of the blastopore and neuropore in some embryos