You searched for: “axillary fossae”
axillary fossa (s) (noun), axillary fossae (pl)
The small hollows under the arms where they join the body at the shoulder: Jill and Kay were up to their axillary fossae, or almost up to their stretched out arms, in water."
This entry is located in the following unit: axillo-, axill-, axil- (page 1)