Source : Webster's Revised Unabridged Dictionary (1913)

Calamint \Cal"a*mint\ (-m[i^]nt), n. [OE. calamint, calemente
   (cf. F. calament) fr. L. calamintha, Gr. kalami`nqh,
   kala`minqos. See 1st {Mint}.] (Bot.)
   A genus of perennial plants ({Calamintha}) of the Mint
   family, esp. the {C. Nepeta} and {C. Acinos}, which are
   called also {basil thyme}.

Source : WordNet®

calamint
     n : perennial aromatic herbs growing in hedgerows or scrub or
         open woodlands from western Europe to central Asia and in
         North America