LATIN DICTIONARYLexicon Latīnum
proper noun · masculinethird declension

♂

♂ m (genitive ♂tis)

Meaning

  1. masculinescribal abbreviation of Mars
    Arte ſivè Chymice parata: ut Vitriolum ♃vis, ☽næ, ♂tis, ☉lis, ♀risThose prepared by art or chemically: as vitriol of Jupiter, of the Moon, of Mars, of the Sun, of Venus1701, Johann Christoph Sommerhoff, Lexicon pharmaceutico-chymicum latino-germanicum & germanico-latinum [Pharmaceutico-Chemical Lexicon, Latin-German and German-Latin], page 399:

Declension

declension
formsingularplural
nominative♂♂tēs
genitive♂tis♂tum
dative♂tī♂tibus
accusative♂tem♂tēs
ablative♂te♂tibus
vocative♂♂tēs

Quick answers

What does ♂ mean in Latin?
♂, a proper noun, means “scribal abbreviation of Mars”.
What is the genitive of ♂?
The genitive singular is ♂tis. ♂ is masculine, third declension.