Dictionary:

maguey

  (mə-gā', măg'wā)

1. Any of various American plants of the genus Agave, especially the century plant. Also called mescal.
2. Any of various plants of the related genus Furcraea.
3. The fiber obtained from any of these plants.

[Spanish, of Cariban origin.]

The noun has 2 meanings:

Meaning #1: Mexican plant used especially for making pulque the source of the colorless Mexican liquor mescal
  Synonym: Agave atrovirens

Meaning #2: Philippine plant yielding a hard fibre used in making coarse twine
  Synonyms: cantala, Agave cantala