Cucumber is a type of squash, but rarely thought of as such. Cucumbers come in a wide variety of types: ridged cucumber (ridge cucumber) with a tough skin and fresh flavour that is grown on raised ridges of soil, hot-house cucumber, which is long and smooth-skinned, grown in hot-houses and watery to taste (basically, tasteless). Cucumber is eaten fresh in salads or mixed in with yoghurt or sour cream as a side dish, e.g. the Indian raita dish. Cucumbers, also, come pickled, salted and are used in soups.
Dowell, P., Bailey, A. (1980) The Book of Ingredients, Dorling Kindersley. ISBN 0718119150.