tropo-, trop-, -tropal, -trope(s), -tropic, -tropism, -tropia, -tropous, -tropy, trep-

(Greek: bend, curve, turn, a turning; response to stimulus)

Don't confuse this tropo-, -tropy element with tropho-, meaning "food, nourishment, nutrition".

epigeotropic (adjective)
A description of the responses of plants on the surface of the earth toward the pull of gravity.
epigeotropism (s) (noun), epigeotropisms (pl)
Plant growth, or movement, on the surface of the earth in response to gravity.
eutropism (s) (noun), eutropisms (pl)
geonyctitropic (adjective)
Characterized by the orientation movements in plants during darkness in response to gravity.
geonyctitropism (s) (noun), geonyctitropisms (pl)
Orientation movements in plants during darkness as they respond to gravity.
geotropic (adjective)
1. A description of the response of plants toward the pull of gravity.
2. An organism that responds to the force of gravity with movement towards the center of the earth.
geotropism (s) (noun), geotropisms (pl)
1. The response of a plant to gravity, as evidenced by growing patterns; such as, downward root growth and growth curvature.
2. Plant growth or movement in response to gravity: "Primary roots (tap roots) grow vertically towards gravity (positive geotropism) whereas primary shoots grow vertically away from gravity (negative geotropism), though the direction of shoot growth may also be modified by light."
heliotrope (s) (noun), heliotropes (pl)
1. A plant that turns or bends so that it faces the sun.
2. Any of the genus Heliotropium, a herb or shrub of the borage family.
3. A heliograph that is capable of reflecting solar rays over long distances.
heliotropic (adjective)
1. Oriented toward sunlight or other light.
2. Describing a plant that grows, or moves, toward the sun.
3. The description of a device that follows the sun's apparent movement across the sky.
heliotropism (s) (noun), heliotropisms (pl)
1. Plant movement or orientation in response to the location of sun light.
2. The reversible phenomenon of color change in a solid as the result of exposure to sun light.
hydrotropism (s) (noun)
The growth or directional response or turning of an organism toward or away from water or moisture.
isotropic (adjective)
Having physical properties that are identical in all directions; such as, heat conductivity, radiation of heat and light or growths, that are the same along any axis of measurement.
lipotropic (adjective)
Having an affinity for fat or increasing the utilization of fat by the body tissues.
lipotropism (s) (noun)
Having the action of removing fat deposits in the liver.
lipotropy (s) (noun)
Prevention of accumulation of fat in the liver.

Inter-related cross references involving word units meaning "bend, curve, turn": diversi-; diverticul-; flect-, flex-; gyro-; meand-; -plex; streph-; stroph-; tors-; verg-; vers-; volv-.