Dictionary.net

• A genus of small marine Crustacea, considered the type of a distinct order (Nebaloidea, or Phyllocarida.)

2010 - New Age Dictionary Database
By Oddity Software

• A genus of small marine Crustacea, considered the type of a distinct order (Nebaloidea, or Phyllocarida.)

1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.