♃

♃ U+2643, ♃ JUPITER ← ♂ Miscellaneous Symbols ♄ →

• Ƶ

The Greek letter Zeta with an abbreviation stroke, for Ζεύς (Zeús), the Greek equivalent to the Roman god Jupiter. The form changed from Classical and early Medieval ⟨Ƶ⟩ to one with a more salient cross, ⟨♃⟩, in the 15th–16th century, at about the time that Christian crosses were added to ⟨☿⟩, ⟨♀⟩ and ⟨♄⟩, and so may have had a similar motivation.

♃

1. (astronomy, astrology) Jupiter.
2. (alchemy, archaic) tin.
3. (alchemy, archaic, rare) electrum.
4. (Can we verify⁽⁺⁾ this sense?) (botany, obsolete) herbaceous perennial plant.

   (the orbital period of Jupiter is 12 years)

5. (rare) Thursday.

   Refers to the Latin phrase dies Iovis, which literally means "Jupiter's day".

• (astronomy): M_♃ – Jovian mass (as a unit of measurement; more commonly M_J).

R_♃ – Jovian radius (more commonly R_J).

• (alchemy): 🜩 – tin ore.

• 
  Late Classical and Medieval forms
• 
  A modern allograph of ♃ that more clearly reflects its origin in the Greek letter 'Z'.
• 
  A decorative variant in the Netherlands
• 
  As a symbol for tin
• 
  An abstract variant
• 
  Symbol on a Tyrian-purple background
• 
  Mariner logo
• 
  Transit of Jupiter

Planetary symbols
· · · – · – · · · · · · · · · · – · · – · · · · · · · ·

♃ m sg (genitive ♃vis); third declension

1. (alchemy) Alternative spelling of Iuppiter (“Jupiter”)
   • 1701, Johann Christoph Sommerhoff, Lexicon pharmaceutico-chymicum latino-germanicum & germanico-latinum [Pharmaceutico-Chemical Lexicon, Latin-German and German-Latin], page 399:

     Arte ſivè Chymice parata: ut Vitriolum ♃vis, ☽næ, ♂tis, ☉lis, ♀ris

     Those prepared by art or chemically: as vitriol of Jupiter, of the Moon, of Mars, of the Sun, of Venus

Third-declension noun, singular only.