21-letter words containing a, g, l, y, c
- schlieren photography — a type of photography which records schlieren
- structural psychology — psychology centering on the analysis of the structure or content of conscious mental states by introspective methods.
- the royal scots greys — (formerly) a British cavalry regiment, the Second Dragoons
- threshold wage policy — a policy whereby wages are increased in accordance with inflation
- vertically challenged — short in stature.
- x-ray crystallography — the determination of the structure of a crystal by the use of x-ray diffraction.