keyhole (oh) and crura of bony saemicircular canals (medicine)

keyhole (oh)

the hole in a lock that you put the key in
::I peeped through the keyhole and watched them.

crura of bony saemicircular canals (medicine)

crura of bony saemicircular canals

The extremities of the bony saemicircular canals in which the corresponding membranous limbs of the saemicircular ducts are located; they are the common bony crus, simple bony crus, and ampullary bony crus.

Synonym: crura ossea canalium saemicircularium, limbs of bony saemicircular canals.

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