RECIPROCATE v.
To move forward and backward alternately; to recur in vicissitude; to act interchangeably; to alternate. One brawny smith the puffing bellows plies, And draws and blows reciprocating air. Dryden. Reciprocating engine, a steam, air, or gas engine, etc., in which the piston moves back and forth; -- in distinction from a…
U n.
English alphabet, is a cursive form of the letter V, with which it was formerly used interchangeably, both letters being then used both as vowels and consonants. U and V are now, however, differentiated, U being used only as a vowel or semivowel, and V only as a consonant. The true primary vowel sound of U, in Anglo-Sa…