Webster's Revised Unabridged Dictionary · 1913

Boultel

Boultel ({not transcribed}) , noun

(a)
(Architecture) A molding, the convexity of which is one fourth of a circle, being a member just below the abacus in the Tuscan and Roman Doric capital; a torus; an ovolo.
(b)
(Architecture) One of the shafts of a clustered column.

Also: Boultin