the end of the finger that is furthest from the hand 指尖 Apply the cream gently using your fingertips. 用指尖轻轻涂抹面霜。
Oxford Collocations DictionaryFingertip is used before these nouns:- search
Idioms
have something at your fingertips
to have the information, knowledge, etc. that is needed in a particular situation and be able to find it easily and use it quickly 掌握（信息等）；熟悉，精通（知识等）；对…了如指掌；有…随时可供使用 I made sure I had all the facts at my fingertips before attending the meeting. 在参加会议之前，我确保掌握了所有的事实。
to your fingertips