Insessor

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Insessor \In*ses"sor\, n.; pl. {Insessores}. [See {Insessores}.]
     (Zool.)
     One of the {Insessores}. The group includes most of the
     common singing birds.
     [1913 Webster]