Before revision: Etymology 280px|Ellen Swallow Richards, the first female student and instructor at MIT The term was derived in the late 19th century from the Greek verb eutheneo, εὐθηνέω (eu, well; the, root of τίθημι tithemi, to cause).
After revision: Etymology The term was derived in the late 19th century from the Greek verb eutheneo, εὐθηνέω (eu, well; the, root of τίθημι tithemi, to cause).