Source : Webster's Revised Unabridged Dictionary (1913)

Clammy \Clam"my\, a. [Compar. {Clammier}; superl. {Clammiest}.]
   [Cf. AS. cl[=a]m clay. See {Clam} to clog, and cf. {Clay}.]
   Having the quality of being viscous or adhesive; soft and
   sticky; glutinous; damp and adhesive, as if covered with a
   cold perspiration.

Source : WordNet®

clammy
     adj : unpleasantly cool and humid; "a clammy handshake"; "clammy
           weather"; "a dank cellar"; "dank rain forests" [syn: {dank}]
     [also: {clammiest}, {clammier}]