chem·i·cal /ˈkɛmɪkəl/ 形容詞
Chem·ic·al a. Pertaining to chemistry; characterized or produced by the forces and operations of chemistry; employed in the processes of chemistry; as, chemical changes; chemical combinations.
Chemical attraction or Chemical affinity. See under Attraction.
Chem·ic·al, n. A substance used for producing a chemical effect; a reagent.
adj 1: relating to or used in chemistry; "chemical engineer";
"chemical balance" [syn: chemic]
2: of or made from or using substances produced by or used in
reactions involving atomic or molecular changes; "chemical
n : produced by or used in a reaction involving changes in atoms