- [countable]
a small piece of jewellery with a part that is pushed through a hole in your ear, nose, etc. 钉状首饰；耳钉；鼻钉 
diamond studs 钻石耳钉 He has a small stud. 他有一只小种马。
- [countable]
a small, round piece of metal that is attached to the surface of something, especially for decoration （尤指装饰用的）饰钉，嵌钉 a leather jacket with studs on the back 后背有饰钉的皮夹克
- [countable, usually plural] (British English)
one of several small metal or plastic objects that are fixed to the bottom part of a football boot or sports shoe （足球鞋或跑鞋上的）鞋钉 - [countable]
a small metal object used in the past for fastening a collar onto a shirt 领扣 - [countable, uncountable]
an animal, especially a horse, that is kept for breeding (= producing young); a place where animals, especially horses, are kept for breeding 种公畜；种马；种畜场；种马场 a stud farm 种马场 The horse was retired from racing and put out to stud (= kept for breeding). 那匹赛马被淘汰下来，留作种马。 horses at stud 种马场的马
- [countable] (informal)
a man who has many sexual partners and who is thought to be sexually attractive 乱搞关系的男人；风流男子
Word Originsenses 1 to 4 Old English studu, stuthu ‘post, upright prop’; related to German stützen ‘to prop’. The sense ‘ornamental metal knob’ arose in late Middle English.senses 5 to 6 Old English stōd, of Germanic origin; related to German Stute ‘mare’, also to stand.