lytoceratid

/L AY1 T OW1 S ER0 AE1 T AH0 D/
noun
  1. 1

    (paleontology) Any member of the family Lytoceratidae of ammonites.

  2. 2

    (paleontology, dated) Any member of the order Lytoceratida (now the suborder Lytoceratina).