middle adult

mid·dle a·dult

(mid'ĕl ă-dŭlt') A person in a nonspecific stage of life, being neither young nor old, but somewhere in the middle. According to Erik Erikson, between ages 40 to 65 years, with the developmental (psychological) task of generativity vs. despair. Often associated with the potential onset of midlife crisis. [AS. middel, + L. adultus, grown up]