Lewis Short
(adjective) : sŭb-ālāris, e
* That is under the arms, placed or carried under the arms: telum,Nep. Alcib. 10, 5: culcitae,Lampr. Heliog. 19 fin.—As substt.
* Sŭbālāres, ĭum, f.plur., the feathers under the wing, Vulg. 4 Esd. 11, 25.
* Sŭbālāre, is, n., an under-girdle, Edict. Diocl. p. 25; cf. Isid. Orig. 19, 33.
Charlton T. Lewis, Charles Short, A Latin Dictionary