The Collaborative International Dictionary of English v.0.48:

Scillain \Scil"la*in\, n. (Chem.)
   A glucoside extracted from squill (Scilla maritima) as a
   light porous substance.
   [1913 Webster + PJC]

The Collaborative International Dictionary of English v.0.48:

Scillitin \Scil"li*tin\, n. [Cf. F. scilitine.] (Chem.)
   A bitter principle extracted from the bulbs of the squill
   (Scilla maritima), and probably consisting of a complex
   mixture of several substances.
   [1913 Webster + PJC] Scimiter

The Collaborative International Dictionary of English v.0.48:

Squill \Squill\ (skw[i^]l), n. [F. squille (also scille a
   squill, in sense 1), L. squilla, scilla, Gr. ?.]
   1. (Bot.)
      (a) A European bulbous liliaceous plant (Urginea
          maritima, formerly Scilla maritima), of acrid,
          expectorant, diuretic, and emetic properties, used in
          medicine. Called also sea onion.
      (b) Any bulbous plant of the genus Scilla; as, the
          bluebell squill (Scilla mutans).
          [1913 Webster]

   2. (Zool.)
      (a) A squilla.
      (b) A mantis.
          [1913 Webster]