"flat of the hand," c.1300, from Old French palme (Modern French paume), from Latin palma "palm of the hand," also "flat end of an oar; palm tree," from PIE *pel- "to spread out; flat" (cf. Greek palame "open hand," Old Irish lam, Welsh llaw, Old English folm, Old High German folma "hand," Sanskrit panih "hand, hoof"). Palm oil is earlier in the punning sense of "bribe" (1620s) than in the literal sense of "oil from the fruit of the West African palm" (1705, from palm (n.2)).
tropical tree, Old English palma, Old French palme, both from Latin palma "palm tree," originally "palm of the hand;" the tree so called from the shape of its leaves, like fingers of a hand (see palm (n.1)).
The word traveled early to northern Europe, where the tree does not grow, via Christianity, and took root in the local languages (e.g. Old Saxon palma, Old High German palma, Old Norse palmr). Palm Sunday is Old English palm-sunnandæg.
In ancient times, a leaf or frond was carried or worn as a symbol of victory or triumph, or on feast days; hence figurative use of palm for "victory, triumph" (late 14c.). Palm court "large room in a hotel, etc., usually decorated with potted palms" first recorded 1908.
"impose (something) on (someone)," 1670s, from palm (n.1). Extended form palm off is from 1822.
The inner surface of the hand that extends from the wrist to the base of the fingers.
To pay someone for a corrupt purpose; bribe; buy favors: If you grease the commissioner's palm, you can get anything fixed/ Officials whose palms have been crossed (1581+)
To conceal a playing card against the palm in order to use it in a gambling hand: It was five cards that he palmed, three aces and a pair of queens (1673+)