What does lī̆mon mean in Latin?

lī̆mon, a noun, means “lemon”.

What is the genitive of lī̆mon?

The genitive singular is lī̆mō̆nis. lī̆mon is third declension.

In classical Latin, [ˈliː.mɔn]; in ecclesiastical (church) Latin, [ˈliː.mon].

nounthird declension

lī̆mon or lī̆mō f (genitive lī̆mō̆nis)

Classical[ˈliː.mɔn]Ecclesiastical[ˈliː.mon]

New Latinlemon
Item, Succus Limonis efficax est ad calculum.1576, [Pope John XXI], Thesaurus Pauperum: Petri Hispani pontificis Romani, philosophi ac medici doctissimi, de Medendis morbis humani corporis Liber: Experimenta particularia per simplicia Medicamenta ex probatissimis Autoribus, & proprijs obseruationibus collecta, continens. […], Francof. apud hæred. Chr. Egen., folio 62, recto:
Odores quoque (licet in his videatur ſemper eſſe quædam Emiſsio corporea) operantur ad Distantias notabiles; vt euenire ſolet nauigantibus iuxta litora Floridæ, aut etiam nonnulla Hiſpaniæ, vbi ſunt Syluæ totæ ex arboribus Limonum, Arantiorum, & huiuſmodi Plantarum adoratarum, aut frutices Roriſmarini, Maioranæ, & ſimilium.The Great Instauration1620, Francis Bacon, Novum Organum, sive Indicia Vera de Interpretatione Naturae [New Organon, or True Directions Concerning the Interpretation of Nature] (Instauratio Magna [The Great Instauration]), London: Apud Joannem Billium, Typographum Regium, page 299:

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium. )