What is "raia clavata"

Maid \Maid\, n. [Shortened from maiden. ?. See Maiden.]

1. An unmarried woman; usually, a young unmarried woman; esp., a girl; a virgin; a maiden.

   Would I had died a maid, And never seen thee, never borne thee son.
   --Shak.

   Can a maid forget her ornaments, or a bride her attire? Yet my people have forgotten me.
   --Jer. ii. 3

2. 2. A man who has not had sexual intercourse. [Obs.]

   Christ was a maid and shapen as a man.
   --Chaucer.

3. A female servant.

   Spinning amongst her maids.
   --Shak.

   Note: Maid is used either adjectively or in composition, signifying female, as in maid child, maidservant.

4. (Zo["o]l.) The female of a ray or skate, esp. of the gray skate ( Raia batis), and of the thornback ( Raia clavata). [Prov. Eng.]

   Fair maid. (Zo["o]l.) See under Fair, a.

   Maid of honor, a female attendant of a queen or royal princess; -- usually of noble family, and having to perform only nominal or honorary duties.

   Old maid. See under Old.

Thornback \Thorn"back`\, n.

1. (Zo["o]l.) A European skate ( Raia clavata) having thornlike spines on its back.

2. (Zo["o]l.) The large European spider crab or king crab ( Maia squinado).