Word: Chimneystack
Definition: A "chimneystack" is the part of a chimney that is above the roof of a building. It is the tall structure that helps carry smoke and gases away from a fireplace or stove. A chimneystack often has several flues, which are the passages that allow smoke to exit the building.
In more advanced contexts, you might discuss the materials used in constructing a chimneystack, its architectural style, or its importance for safety and ventilation in a home.
While "chimneystack" primarily refers to the part of a chimney, the word "chimney" itself can refer to the whole structure that includes both the above-roof and below-roof components.
There are no specific idioms or phrasal verbs that include "chimneystack." However, you might hear expressions like "to smoke out," which can refer to the act of using a chimney to vent smoke.
To sum up, a "chimneystack" is an important part of a building's chimney, standing above the roof to allow smoke to escape safely.