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), more epigeotropic, most epigeotropic
A description of the responses of plants on the surface of the earth toward the pull of gravity: In her botany class, Judy learned about the epigeotropic force that gravity has on plants on top of the soil.
epigeotropism (s) (noun), epigeotropisms (pl)
Plant growth or plant movement on the surface of the earth in response to gravity: Epigeotropism deals with the development of vegetation across the surface of the soil.
eutropism (s) (noun), eutropisms (pl)
geonyctitropic (adjective) (not comparable)
Characterized by the orientation movements in plants during darkness in response to gravity: One example of a geonyctitropic plant is cannabis in which the leaves move downward from a horizontal position during the day to a more vertical down-facing position at night.
geonyctitropism (s) (noun), geonyctitropisms (pl)
The condition of an orientation movement in plants during darkness as they respond to gravity: The situation of geonyctitropism can be exemplified in cannabis plants when the leaves take on a downward position at night.
geotropic (adjective) (no pl)
A description of the response of plants toward the pull of gravity: Plant roots are geotropic because they react to the force of gravity with a downward 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: Geotropism can be explained as the 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-.