FRAUNHOFER LINES
Fraun"ho*fer lines`. (Physics.)
Defn: The lines of the spectrun; especially and properly, the dark lines of the solar spectrum, so called because first accurately observed and interpreted by Fraunhofer, a German physicist.
FRAXIN
Frax"in, n. Etym: [From Fraxinus.] (Chem.)
Defn: A colorless crystalline substance, regarded as a glucoside, and found in the bark of the ash (Fraxinus) and along with esculin in the bark of the horse-chestnut. It shows a delicate fluorescence in alkaline solutions; — called also paviin.
FRAXINUS
Frax"i*nus, n. Etym: [L., the ash tree.] (Bot.)
Defn: A genus of deciduous forest trees, found in the north temperate zone, and including the true ash trees.
Note: Fraxinus excelsior is the European ash; F. Americana, the white ash; F. sambucifolia, the black ash or water ash.
FRAY
Fray, n. Etym: [Abbreviated from affray.]
Defn: Affray; broil; contest; combat.
Who began this bloody fray Shak.
FRAY
Fray, v. t. [imp. & p. p. Frayed; p. pr. & vb. n. Fraying.] Etym:
[See 1st Fray, and cf. Affray.]