sinus rhomboidalis

noun
sinus rhom·​boi·​da·​lis | \ -ˌräm-ˌbȯid-ˈā-ləs How to pronounce sinus rhomboidalis (audio) \

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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miscellaneous remnants or debris

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