资料来源 : Webster's Revised Unabridged Dictionary (1913)

Mechoacan \Me*cho"a*can\, n.
   A species of jalap, of very feeble properties, said to be
   obtained from the root of a species of {Convolvulus} ({C.
   Mechoacan}); -- so called from Michoacan, in Mexico, whence
   it is obtained.