Medical Dictionary

sinus rhomboidalis

noun sinus rhom·boi·da·lis \-ˌräm-ˌbid-ˈā-ləs\

Medical Definition of SINUS RHOMBOIDALIS

:  the posterior expanded and for a long time incompletely closed part of the neural groove of vertebrate embryos; also :  an expansion of the central canal in the sacral region derived from it


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