Definition: The word "teat" is a noun that refers to the small projection of a mammary gland, which is found on female mammals. It is where milk comes out when a mother is feeding her baby.
In more advanced contexts, "teat" can also refer to artificial devices used to feed babies, like a baby bottle nipple. For example, "The bottle has a soft teat that mimics a mother's nipple."
While "teat" primarily refers to the projection from the mammary gland, in some informal contexts, it can also be used humorously or derogatorily to describe someone acting in a childish or dependent manner, but this usage is less common.
There are no common idioms or phrasal verbs that specifically include the word "teat."
The word "teat" is important in discussions about animal biology and breastfeeding. It is a specific term used to describe the body part from which milk is delivered to young animals.