ETYMOLOGY
from Latin masculus (male) + -ous
EXAMPLE
“…I doubt not but he will send a Copy of it to your L. and then it will speak for it self; believe me I never heard him do any thing like it, and so thinketh every one in the Synod; it was learned, devout, and the stile masculous …”
From: Golden Remains of the Ever Memorable, Mr. John Hales
By John Hales, 1659
Dr. Balcanquals Letters from the Synod of Dort, March, 1619
Lexicophilia 