fondant
Sweet creamy sugar paste used in candies and icings. Candy containing
this paste.

fontanelles
The soft membranous gaps between the incompletely formed cranial bones
of a fetus or an infant. Also called soft spot.

formaldehyde
Colorless gaseous compound, HCHO, used to manufacture resins,
fertilizers, dyes, and embalming fluids and in aqueous solution as a
preservative and disinfectant.

formalin
Aqueous solution of formaldehyde that is 37 percent by weight.

fossa
A small depression, as in a bone.

foulard
Lightweight twill or plain-woven fabric of silk or silk and cotton,
often having a small printed design. Necktie or scarf, made of this
fabric.

Fowler's solution
Solution of arsenite of potassium in water; named for Fowler, an English
physician who brought it into use.

frock coat
Man's dress coat or suit coat with knee-length skirts.