noun
The flat inner surface of the hand, from the wrist to the base of the fingers.
彼は手のひらに小銭をのせた。
He placed some coins on his palm.
手のひらを上に向けてください。
Please turn your palm upward.
Most common modern spelling; uses kana for ひら to avoid rare kanji.
Single-kanji spelling; common in formal or literary contexts. Also read たなごころ (archaic) and しょう (bound).
Alternate kanji-kana mix; less common than 手のひら.
Compound of 手 (hand) + の (possessive particle) + ひら (flat surface). The reading たなごころ is archaic and derived from 手の心 (heart of the hand).