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There are 15 twelve-letter words containing TROPISM

AEROTROPISMSAEROTROPISM n. curvature in response to concentration of oxygen.
ALLOTROPISMSallotropisms n. Plural of allotropism.
ALLOTROPISM n. the state of an element existing in more than one form.
ANISOTROPISManisotropism n. Alternative form of anisotropy.
ANISOTROPISM n. the state of being anisotropic.
CHEMOTROPISMchemotropism n. (Biology) The movement or growth of an organism in response to a chemical stimulus.
CHEMOTROPISM n. plant growth in the direction of a particular chemical.
GAMOTROPISMSGAMOTROPISM n. the tendency of gametes to attract each other.
GRAVITROPISMgravitropism n. (Biology, botany) a plant’s ability to change its growth in response to gravity.
HAPTOTROPISMhaptotropism n. (Biology) The movement of parts of a plant (especially tendrils) in response to a touch stimulus.
HAPTOTROPISM n. curving in response to touch, as a tendril.
HELIOTROPISMheliotropism n. The property of some plants of turning under the influence of light; either positively (towards the…
HELIOTROPISM n. the movement of plants towards sunlight.
HEMITROPISMSHEMITROPISM n. the state of being a hemitrope, a twinned crystal.
HYDROTROPISMhydrotropism n. (Biology) The movement of a plant (or other organism) in response to water, either towards or away from water.
HYDROTROPISM n. growth in the direction of water.
NYCTITROPISMnyctitropism n. (Botany) Synonym of nyctinasty.
NYCTITROPISM n. the assumption by plants of certain positions at night, esp. ones different from daytime positions.
ORTHOTROPISMorthotropism n. The property of being orthotropic or orthotropous.
ORTHOTROPISM n. vertical growth.
PHOTOTROPISMphototropism n. (Biology) The movement of a plant towards or away from light.
PHOTOTROPISM n. movement directed by light.
PLEIOTROPISMpleiotropism n. (Genetics) pleiotropy.
PLEIOTROPISM n. the state of being pleiotropic, having an effect simultaneously on more than one character in the offspring.
RHEOTROPISMSrheotropisms n. Plural of rheotropism.
RHEOTROPISM n. the direction of growth by water.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the 1Word.ws and WikWik.org.

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