Emily Dickinson Lexicon

PHASE, or PHA'SIS, n. [plur. Phases. Gr. φασις, from φαινω, φαω, to shine.]

1. In a general sense, an appearance; that which is exhibited to the eye; appropriately, any appearance or quantity of illumination of the moon or other planet. The moon presents different phases at the full and the quadrature.
2. In mineralogy, transparent green quartz. – Cyc.