chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions

chemical phenomenon - any natural phenomenon involving chemistry (as changes to atoms or molecules)

dimorphism - (chemistry) the property of certain substances that enables them to exist in two distinct crystalline forms

biological science, biology - the science that studies living organisms

organic phenomenon - (biology) a natural phenomenon involving living plants and animals

dimorphism - (biology) the existence of two forms of individual within the same animal species (independent of sex differences)