term
noun:a word or phrase used to describe a concept, especially in a particular field or subject
The scientific term for the throat is the 'pharynx'.
noun:a fixed or limited period of time during which something lasts or is intended to last such as an academic semester or a legislative session
She won a second four-year term as mayor.
The contract is nearing its term.
noun:the normal duration of pregnancy
noun:conditions under which an agreement is made; stipulations