(calligraphy, historical) Either of two styles of handwriting: a written form of black letter used in France and England from about 1350, developed in the Lateran chancelry in the 13th century, or a style of cursive handwriting introduced in the 1420s by Niccolò de' Niccoli, developed from humanist minuscule; a variety of either of these styles.

(engineering) One of a set of wheels of different sizes and number of teeth, that may be changed or substituted for one another in machinery, to produce a different but definite rate of angular velocity in an axis, as in cutting screws, gear, etc.

A complicated French poetic form, a variation of the ballad form, consisting of five eleven-line stanzas with the rhyme scheme a-b-a-b-c-c-d-d-e-d-E and a five-line envoi rhyming d-d-e-d-E or a seven-line envoi c-c-d-d-e-d-E. Rhyming words cannot be repeated.

Euphemistic form of snowball's chance in hell.

A deputy to the vice-chancellor of a university.

plural of chana

(idiomatic) Little or no likelihood.

Negative short-term reaction to changes in a product or service.

Synonym of if it ain't broke, don't fix it

A fish of the species Ictalurus punctatus, native to eastern North America.