Lewis & Short

inter-scăpĭlĭum, i, n. [scapula], the space between the shoulders (post-class.), App. Flor. 14, p. 350, 11; Hyg. Astr. 3, 3; Isid. Orig. 11, 1, 93.
Plur., Cael. Aur. Tard. 1, 4, 77.