The Collaborative International Dictionary of English v.0.48:

Coriander \Co`ri*an"der\ (k?`r?-?n"d?r), n. [L. coriandrum, fr.
   Gr. ????, ????, perh. fr. ??? bug, on account of the buglike
   or fetid smell of its leaves: cf. F. coriandre.] (Bot.)
   An umbelliferous plant, the Coriandrum sativum, the fruit
   or seeds of which have a strong smell and a spicy taste, and
   in medicine are considered as stomachic and carminative.
   [1913 Webster]

WordNet (r) 3.0 (2006):

coriander
    n 1: Old World herb with aromatic leaves and seed resembling
         parsley [syn: coriander, coriander plant, Chinese
         parsley, cilantro, Coriandrum sativum]
    2: dried coriander seeds used whole or ground [syn: coriander,
       coriander seed]
    3: parsley-like herb used as seasoning or garnish [syn:
       coriander, Chinese parsley, cilantro]

Easton's 1897 Bible Dictionary:

Coriander
   Heb. gad, (Ex. 16:31; Num. 11:7), seed to which the manna is
   likened in its form and colour. It is the Coriandrum sativum of
   botanists, an umbelliferous annual plant with a round stalk,
   about two feet high. It is widely cultivated in Eastern
   countries and in the south of Europe for the sake of its seeds,
   which are in the form of a little ball of the size of a
   peppercorn. They are used medicinally and as a spice. The Greek
   name of this plant is korion or koriannon, whence the name
   "coriander."