Etymology
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heliotropism (n.)

1854, from heliotrope + -ism.

Entries linking to heliotropism

heliotrope (n.)

"plant which turns its flowers and leaves to the sun," 1620s, from French héliotrope (14c., Old French eliotrope) and directly from Latin heliotropium, from Greek hēliotropion "sundial; heliotropic plant," from hēlios "sun" (from PIE root *sawel- "the sun") + tropos "a turn, change" (from PIE root *trep- "to turn"). In English the word in Latin form was applied c. 1000-1600 to heliotropic plants. Related: Heliotropic.

-ism 
word-forming element making nouns implying a practice, system, doctrine, etc., from French -isme or directly from Latin -isma, -ismus (source also of Italian, Spanish -ismo, Dutch, German -ismus), from Greek -ismos, noun ending signifying the practice or teaching of a thing, from the stem of verbs in -izein, a verb-forming element denoting the doing of the noun or adjective to which it is attached. For distinction of use, see -ity. The related Greek suffix -isma(t)- affects some forms.
tropism (n.)
1899, "tendency of an animal or plant to turn or move in response to a stimulus," 1899, abstracted from geotropism or heliotropism, with the second element taken in an absolute sense; ultimately from Greek tropos "a turning" (from PIE root *trep- "to turn").
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Definitions of heliotropism

heliotropism (n.)
an orienting response to the sun;
From wordnet.princeton.edu

Dictionary entries near heliotropism

heliocentric

heliograph

heliolatry

heliophobia

heliotrope

heliotropism

heliport

helium

helix

hell

Hell's Kitchen

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