chemistry; not cyclic; having an open chain structure botany; not cyclic; especially having parts arranged in spirals rather than whorls
{s} not cyclic; not occurring in cycles; not arranged in whorls (Botany); having an open-chain molecular structure rather than a closed ring-shaped chain (Chemistry)
A data structure that represents a set of strings and allows for a query operation that tests whether a given string belongs to the set in time proportional to its length (thus more efficient in some situations than a trie)