symbiosis

n [U](biology 生) relationship between two species, organisms,etc that live close together and depend on each other in various ways 共生（关系）: the symbiosis between a plant and the insect that fertilizes it 一植物与使其受精昆虫的共生关系.

sycamore, sycophancy, sycophant, sycophantic, sycophantically, Sydney, Sydney Chapman, syllabary, syllabic, syllabically, syllabification, syllabify, syllable, syllabub (also sillabub), syllabus, syllogism, syllogistic, sylph, sylphlike, sylvan, symbiotic, symbol, symbolic, symbolically, symbolism, symbolist, symbolize, symbolize, symbolise, symmetric, symmetrical, symmetrically, symmetry, sympathetic, sympathetically, sympathise, sympathize, sympathize with, sympathize, sympathise, sympathizer, sympathiser, sympathy,