18-letter words containing a, l, f, y, i
- refrigerated lorry — a lorry which is chilled in the back as for storing food
- relative frequency — the ratio of the number of times an event occurs to the number of occasions on which it might occur in the same period.
- run in sb's family — If a characteristic runs in someone's family, it often occurs in members of that family, in different generations.
- safety regulations — regulations or rules that are put in place to ensure a product, event, etc, is safe and not dangerous
- sampling frequency — sample rate
- self-contradictory — an act or instance of contradicting oneself or itself.
- self-deprecatingly — in a self-deprecating manner
- significant symbol — a verbal or nonverbal gesture, as a word or smile, that has acquired a conventionalized meaning.
- sulfuric anhydride — sulfur trioxide.
- the family compact — the ruling oligarchy in Upper Canada in the early 19th century
- thermal efficiency — the ratio of the work output of a heat engine to the heat input expressed in the same units of energy.
- to play favourites — to display favouritism
- university faculty — a division within a university comprising one subject area, or a number of related subject areas
- wildlife sanctuary — an area where wild animals and plants are protected
- witch hazel family — the plant family Hamamelidaceae, characterized by trees and shrubs having alternate, simple leaves, flowers in clusters or heads, and fruit in the form of a double-beaked woody capsule, and including the sweet gum, witch alder, and witch hazel.