εὐρυκοίλιος
From LSJ
Sunt verba voces quibus hunc lenire dolorem possis, magnam morbi deponere partem → Words will avail the wretched mind to ease and much abate the dismal black disease.
English (LSJ)
ον,
A hollow, of the right ventricle of the heart, Hp. Cord.4; with wide cavity, of the caecum, Ruf. ap. Orib.7.26.25.