retentive circumferential clasp arm

re·ten·tive cir·cum·fer·en·tial clasp arm

an arm that is flexible and engages the infrabulge at the terminal end of the arm.

re·ten·tive cir·cum·fer·en·tial clasp arm

(rē-tentiv sĭr-kŭmfĕr-enshăl klasp ahrm)
Arm that is flexible and that engages infrabulge at terminal end of itself.