phra·se·ol·o·gy 
(frā′zē-ŏlə-jē)
(frā′zē-ŏlə-jē)n. pl. phra·se·ol·o·gies
1. The way in which words and phrases are used in speech or writing; style.
2. A set of expressions used by a particular person or group: nautical phraseology.
phra′se·o·logi·cal (-ə-lŏjĭ-kəl) adj.
phra′se·olo·gist n.