able to adjust and meet the needs of new conditions a substance that combines to form the structure of proteins when something is equal to something else i.e. they are worth the same amount a state of flow and change when different styles, ideas or designs combine to form something new; in physics: when atoms combine to produce nuclear energy a chemical produced by the body to control some function a colorless chemical element without a smell that forms most of the earth's atmosphere concerning how the body functions the ratio of the circumference to the diameter of a circle; approximately equal to 3.14 being reasonable and possibly true being difficult to deal with or fix to arrange in a random order to repeat something, such as an experiment, study or process referring to the five senses (hearing, sight, smell, taste and touch) to make something easier to do, use or understand a substance which a catalyst or enzyme has an effect on a willingness to let people do, say or believe what they wish, without judging or challenging them a large stretch of land something written a good quality