The Collaborative International Dictionary of English v.0.48:

Dermoid \Der"moid\, a. [Derm + -oid: cf. F. dermo["i]de.]
   Same as Dermatoid.
   [1913 Webster]

   Dermoid cyst (Med.), a cyst containing skin, or structures
      connected with skin, such as hair.
      [1913 Webster]