Webster's Revised Unabridged Dictionary · 1913

Crownet

Crownet (kroun"?t) , noun

[See Crown, Coronet.]

1.
A coronet. [Rare] — P. Whitehead
2.
The ultimate end and result of an undertaking; a chief end. [Obsolete]
O this false soul of Egypt! this grave charm.... Whose bosom was my crownet, my chief end. — Shakespeare