Definition of transient. 1  1 : one that is transient (see 1transient): such asa : a guest or boarder who stays only brieflyb : a person traveling about usually in search of work. 2  2a : a temporary oscillation that occurs in a circuit because of a sudden change of voltage or of loadb : a transient current or voltage.
Gerontophobia is the fear of growing old, or a hatred or fear of the elderly. Many people have this phobia. The term comes from the Greek Î³Î­ÏÏÎ½ â gerÅn, old man and ÏÏÎ²Î¿Ï â phobos, fear. 1 Ageism.
Gerontology. a division of medicobiological science that studies the phenomena of aging in living organisms, including man. The subdivisions of gerontology are geriatrics (the study of the diseases of the senescent organism), geriatric hygienics (the study of the hygiene of the elderly), and gerontological psychology. The study of gerontology was developed with the essential changes in manâs life expectancy.