释义 |
ob·tu·ra·tor \ˈ ̷ ̷ ̷ ̷ˌrād.ə(r)\ noun (-s) Usage: often attributive Etymology: New Latin, from Latin obturatus + -or : one that closes or stops up an opening: a. : either of two muscles arising from the obturator membrane and adjacent bony surfaces: (1) or obturator ex·ter·nus \-ekˈstərnəs\ : a muscle arising from the outer surface of the membrane and being inserted into the trochanteric fossa of the femur (2) or obturator in·ter·nus \-inˈtərnəs\ : a muscle arising from the inner surface of the membrane and being inserted into the greater trochanter of the femur b. : a prosthetic device that usually has the form of a plate and is designed to bridge an unnatural opening (as a fissure of the palate) c. : a device for preventing the escape of gas through the breech mechanism of a breech-loading gun d. : a hooded swelling of the placenta that fits over the nucellus in some plants |