Twining stem is a type of plant stem that grows by wrapping around other plants or structures. The term 'twining stem' is made up of two words: bine and TENDRIL. Bine is a four-letter word meaning a climbing plant that wraps itself around a support by means of its shoots, while TENDRIL is a seven-letter word meaning a slender threadlike organ of a climbing plant, used for twining around a support. Together, these two words form the term 'twining stem, ' which describes a type of stem that grows by wrapping around other plants or structures.