手掌 is read as しゅしょう (shushou) and means palm.
しゅしょう
shushou
てちょう
certificate
てじょう
confinement in chains (Edo-era judicial corporal punishment)
てがら
achievement
てぶり
(hand) gesture
てあたりしだい
using anything one can lay one's hands on
たづな
control
てびかえ
holding oneself back
てごたえ
response (felt in the hands)
てさげ
handbag
てせい
handmade
てがたい
steady
てべんとう
working without pay