sinus rhomboidalis
rhom·boi·dal si·nus
, sinus rhomboidalissinus rhomboidalis
(1) Cavity of septum pellucidum; cavum septi pellucidi [NA6].(2) Terminal ventricle of spinal cord; ventriculus terminalis medullae spinalis [NA6].
rhom·boi·dal si·nus
, sinus rhomboidalis (rom-boy'dăl sī'nŭs, rom'boy-dā'lis)Synonym(s): rhombocele.