phosphor

name

1. Alternative spelling of Phosphorus (“the planet Venus, as the morning star”).

   “All night no ruder air perplex ⁠Thy sliding keel, till Phosphor, bright ⁠As our pure love, thro’ early light Shall glimmer on the dewy decks.”

   “Anna likened you to Phosphor, the morning star, and herself to Hesper, the mortal star of evening, and when I told her those twin stars were one and the same, and not a star at all but the planet Venus,[…]”

noun

Etymology: From Medieval Latin phosphorus.

1. Any of various compounds of transition metals or of rare earths that exhibit phosphorescence.
2. Phosphorus.
3. The planet Venus, when appearing as a morning star