Source : Webster's Revised Unabridged Dictionary (1913)

Legumen \Le*gu"men\ (l[-e]*g[=u]"m[e^]n), n.; pl. L. {Legumina}
   (-m[i^]*n[.a]), E. {Legumens} (-m[e^]nz). [L.]
   Same as {Legume}.