The Collaborative International Dictionary of English v.0.48:

Olusatrum \O*lu"sa*trum\, n. [L. holusatrum, olusatrum; olus
   garden herb + ater black.] (Bot.)
   An umbelliferous plant, the common Alexanders of Western
   Europe (Smyrnium Olusatrum).
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Alexander \Alexander\ n.
   1. 1 a European herb (Smyrnium olusatrum) somewhat
      resembling celery widely naturalized in Britain coastal
      regions and often cultivated as a potherb.

   Syn: Alexanders, black lovage, horse parsley
        [WordNet 1.5]

   2. 1 the famous king of Macedon, son of Philip; conqueror of
      Greece and Egypt and Persia; founder of Alexandria --
      (356-323 BC).

   Syn: Alexander the Great
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Alexanders \Alexanders\ n.
   1. same as Alexander[wn1]; Smyrnium olusatrum.

   Syn: Alexander, black lovage, horse parsley, Smyrnium
        olusatrum
        [WordNet 1.5] Alexanders

WordNet (r) 3.0 (2006):

Smyrnium olusatrum
    n 1: European herb somewhat resembling celery widely naturalized
         in Britain coastal regions and often cultivated as a
         potherb [syn: Alexander, Alexanders, black lovage,
         horse parsley, Smyrnium olusatrum]