dĕcĭmātĭo — Lewis & Short
dĕcĭmātĭo, ōnis, f.decimo,
I the taking of a tenth.
I A tithing:
omnis,Vulg. Tobiae, 1, 7.—
II A selecting by lot of every tenth man for punishment, decimation, Capitol. Macr. 12.—
III A tenth:
adhuc in ea decimatio,Vulg. Isa. 6, 13.