Emily Dickinson Lexicon

LIQ'UID, n.

1. A fluid or flowing substance; a substance whose parts change their relative position on the slightest pressure, and which flows on an inclined plane; as, water, wine, milk, &c.
2. In grammar, a letter which has a smooth flowing sound, or which flows smoothly after a mute; as 1 and r, in bla, bra. m and n are also called liquids.