楼主应该打错了吧。是不是nipple呢？下面是nipple的解释：nipplen.（名词）The small projection near the center of the mammary gland containing the outlets of the milk ducts through which young mammals obtain milk from the adult female; a teat.乳头：靠近乳腺中心的小的凸起物，含有乳导管的出口，幼小的哺乳动物从成年雌性身上由此吸取乳汁；乳头The rubber cap on a bottle from which a baby nurses.橡皮乳头：奶瓶上用于喂婴儿用的橡皮奶头A pacifier for an infant.婴儿用的奶嘴Any of various devices functioning like or resembling a nipple, especially:似乳头的东西：任何一种具有类似乳头功能的器具或设备，尤指：A regulated opening for discharging a liquid, as in a small stopcock.水龙头：用于控制液体排出的开口，如在小的旋塞阀里A pipe coupling threaded on both ends.螺纹接头：一种两端都带外螺纹的管子A short extension of pipe to which a nozzle can be attached.用于绑缚喷嘴的一节伸出的短管A small projection through which grease in a grease gun can be forced into a bearing.滑油嘴：一个小的突起，通过它滑油枪中的润滑油能被注入轴承A natural or geographic projection resembling a nipple, as a mountain crest.乳头状物：类似乳头的任何自然的或地理上的突起物，如山顶
