(Catholicism) A feast day on which the faithful are expected to attend Mass.

plural of holy day of obligation

(law) A duty by which a party to an agreement is legally bound to pay the maturity of a debt at a time and in a manner as is stipulated within a given contract or promissory note.

simple past tense and past participle of oblate

present participle of oblate

(anatomy) Ellipsis of external oblique muscle..

(anatomy) Ellipsis of internal oblique muscle..

(anatomy) A flat muscle on each side that form the outer layer of the lateral walls of the abdomen, that have aponeuroses extending medially to ensheathe the rectus muscles and fusing in the midventral line in the linea alba, and that act to compress the abdominal contents and to assist in expelling the contents of various visceral organs (as in urination, defecation, parturition, and expiration).

(anatomy) A flat muscle situated under the external oblique muscle in the lateral and ventral part of the abdominal wall, that have aponeuroses extending medially to ensheathe the rectus muscles and fusing in the midventral line in the linea alba, and that act to compress the abdominal contents and to assist in expelling the contents of various visceral organs (as in urination, defecation, parturition, and expiration).

(anatomy) A long thin extraocular muscle that arises just above the margin of the optic foramen, is inserted on the upper part of the eyeball, and moves the eye downward and laterally.