phasis

noun3

1. •
   (no longer used) A phase (of the moon, a planet etc.).

   • [A]s the same face of the moon always is turned to the earth, the lunar tides must be permanent, and if the solid parts of the moon be spherical, must always cover the phasis next to us. — 1791
2. •
   (no longer used) Any phase or aspect of something.

   • He o'er the seas shall love or fame pursue, / And other Months, another Phasis view […]. — 1697
3. •
   (no longer used) The first appearance of the new moon.