noun, plural pha·ses [fey-seez] /ˈfeɪ siz/.

a manner, stage, or aspect of being; phase.

Origin of phasis

1650–60; < New Latin < Greek phásis appearance, equivalent to pha- (base of phaínein to show) + -sis -sis Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for phasis

Historical Examples of phasis