A genus of tall perennial herbs resembling grasses. They grow in wet places and have unbranched round stems; narrow, flat grassy leaves; and small clusters of greenish or brown flowers.
Any of a large group of monocotyledonous plants, commonly found in boggy and marshy areas, with erect tufts of thin, straight, green stems and heads of tiny drab-colored flowers. The true rushes belong to the large genus Juncus but the term is also used for certain of the sedges (family Cyperaceae). The flowering rush is Butomus umbellatus.
A strong contraction wave that moves down the small intestine.