- (also palm tree)
a straight tree with a mass of long leaves at the top, growing in tropical countries. There are several types of palm tree, some of which produce fruit. 棕榈树 
a date palm 枣椰树 a coconut palm 椰子树 palm leaves/fronds/groves 棕榈叶；棕榈树丛
Oxford Collocations Dictionaryadjective- coconut
- date
- oil
- …
- tree
- branch
- frond
- …
the inner surface of the hand between the wrist and the fingers 手掌；手心 
He held the bird gently in the palm of his hand. 他把小鸟轻轻地托在掌心。 sweaty palms 汗涔涔的手掌 to read somebody’s palm (= to say what you think will happen to somebody by looking at the lines on their palm) 看手相
Extra ExamplesTopics Bodyb2He rubbed his palms against his jeans. 他在牛仔裤上擦了擦手掌。 He showed me the coins in his palm. 他给我看他手心里的硬币。 He spread his palms in a gesture of openness. 他展开手掌，以示坦诚。 He took her hand between his palms and squeezed it. 他双手紧紧握住她的手捏了一捏。 His right palm was resting against my neck. 他把右手放在我的脖子上。 Hold out your arms with the palms facing downwards. 伸出你的胳膊，手心朝下。 She held out her hand to me, palm up. 她向我摊开掌心。
Oxford Collocations Dictionaryadjective- soft
- sweaty
- warm
- …
- hold up
- raise
- extend
- …
- sweat
- face
- rest
- …
- reader
- reading
- …
- against your palms
- between your palms
- in your palm
- …
Word Originnoun sense 2 Old English palm(a), of Germanic origin; related to Dutch palm and German Palme, from Latin palma ‘palm (of a hand)’, its leaf being likened to a spread hand. noun sense 1 Middle English: from Old French paume, from Latin palma. Current senses of the verb date from the late 17th cent.
Idioms
cross somebody’s palm with silver
to give somebody money so that they will do you a favour, especially tell your fortune 为得到好处而给某人钱；（尤指）付钱请人算命
grease somebody’s palm
- (old-fashioned, informal)
to give somebody money in order to persuade them to do something dishonest 向某人行贿；用金钱收买
have somebody in the palm of your hand
to have complete control or influence over somebody 完全控制某人；把某人攥在手心里 Even before he plays a note, he has the audience in the palm of his hand. 甚至在他演奏一个音符之前，他就已经把听众捧在手心里了。