The Collaborative International Dictionary of English v.0.48:
aloe \al"oe\ ([a^]l"n[-o]), n.; pl. Aloes ([a^]l"[=o]z). [L.
alo["e], Gr. 'alo`h, aloe: cf. OF. aloe, F. alo[`e]s.]
1. pl. The wood of the agalloch. [Obs.] --Wyclif.
2. (Bot.) [capitalized] A genus of succulent plants, some
classed as trees, others as shrubs, but the greater number
having the habit and appearance of evergreen herbaceous
plants; from some of which are prepared articles for
medicine and the arts. They are natives of warm countries.
3. pl. (Med.) The inspissated juice of several species of
aloe, used as a purgative. [Plural in form but
syntactically singular.] AS
American aloe, Century aloe, the agave. See Agave.