Matin /(?)/

Mat·in

Matin

n.
  1. Morning. [Obs.]
  2. Morning worship or service; morning prayers or songs.
    The winged choristers began To chirp their matins.
    — Cleveland.
  3. Time of morning service; the first canonical hour in the Roman Catholic Church.

matin

a.
  1. Of or pertaining to the morning, or to matins; used in the morning; matutinal.