Source : Webster's Revised Unabridged Dictionary (1913)

Scray \Scray\, n. [Cf. W. ysgr["a]en, ysgr["a]ell, a sea
   swallow, Armor. skrav.] (Zo["o]l.)
   A tern; the sea swallow. [Prov. Eng.] [Written also
   {scraye}.]