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Webster 1913 Edition

Noun.

A plant coif or skullcap. Same as

B. Jonson.

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Noun.

[F.

calotte

, dim. of

cale

a sort of flat cap. Cf.

A close cap without visor or brim.

Especially:

(a)

Such a cap, worn by English serjeants at law.

(b)

Such a cap, worn by the French cavalry under their helmets.

(c)

Such a cap, worn by the clergy of the Roman Catholic Church.

To assume the calotte

to become a priest.

callot ‎(plural callots)

Obsolete form of calotte (a skullcap)
(Can we find and add a quotation of Ben Jonson to this entry?)