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A nipple is the small, raised part in the center of the chest, on both women's and men's bodies — on women, it's the part a baby feeds from. The same word is used for the rubber part at the top of a baby's bottle, shaped similarly, that the baby sucks on to drink milk (in British English this is usually called a "teat" instead). There's also a technical, mechanical meaning: a small metal fitting, often shaped like a nipple, used to connect or add grease to machine parts.
乳頭；(嬰兒奶瓶)奶嘴頭(美式用法，英式常說 teat)；(機械)接頭
原始詞典資料12 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
nipplenoun/ˈnɪp.əl/
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anatomymedicinesciencesThe projection of a mammary gland from which, on female therian mammals, milk is secreted.
- Mary felt annoyed at the girl; just because bras had become passé, did a girl with so pronounced a bosom have to cater to fashion? In this case practicality dictated a bra, and Mary stood at the desk feeling herself flushing with disapproval. And artificial nipple-dilation; it was just too much.
- 2
The nipple (noun sense 1) and the areola together.
- Joan Trieste wore skin-tight dark pants and slippers and a cotton man’s-style shirt; as far as he could tell, she had on no bra, as fashion dictated, but her nipples were merely flat dark circles beneath the white cotton fabric of her shirt: she could not afford or did not care to have the currently-popular dilation operation.
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A mechanical device through which liquids or gases can be passed in a regulated manner.
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An artificial nipple (noun sense 1) used for bottle-feeding infants.
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Any small physical protrusion, such as the lumps on the F and J keys on computer keyboards.
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Any small physical protrusion on an automotive, a machine part or any other part that fits into a groove on another part.
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historicalA perforated segment that fits into part of the breech of a muzzle-loading gun, on which the percussion cap is fixed.
- I could tell he didn't agree but he went to the corner and took up his squirrel gun, feeling the nipple for a percussion cap.
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businessconstructionmanufacturingA short tube threaded at both ends, used as a connector.
另外 2 個記錄的用法
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cyclinghobbieslifestyleAn internally threaded piece which holds a bicycle spoke in place on the rim.
- These were first constructed by heading the spokes, threading them through a steel felloe or rim and inserting them into screwed nipples which were in their turn screwed into the flanges of the hub.
- In the original context of the World Wide Web the ’authorities’ are information sources, whereas herein the ’authorities’ are the material sinks. The hubs remain the ’naves’ in the link structure but are the sources of material. Continuing the wheel analogy, the authorities would be ‘spoke nipples’
- 10
computingengineeringmathematicsA pointing stick.
nippleverb/ˈnɪp.əl/
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To fit (a baby's bottle, etc.) with a nipple.
- 2
To give one's nipple to (a baby) to allow breastfeeding.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。