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Growth or orientation of a sessile organism, especially a plant, toward or away from the light of the sun.

he′li·o·tro′pic (-ə-trō′pĭk) adj.


(ˌhi li əˈtrɒp ɪk, -ˈtroʊ pɪk)

turning or growing toward the light, esp. sunlight.
he`li•o•trop′i•cal•ly, adv.


References in periodicals archive ?
Around 20 patients, mainly children aged 3-5 years, were taken to a hospital with heliotropic hepatitis last week, GBAO Health Care and Social Security Department Chief Nasrigul Nekushoyeva said on February 12.
Metabolites from the lichen Ochrolechia parella growing under two different heliotropic conditions.
Pathognomonic features are the heliotropic rash and Gottron's lesions.
Despite O Cidadan:poems intellectual attraction--that heliotropic effect--deciphering its meaning proves to be an insuperable task.
A company known as Nur Energy intends to capture some of it by constructing a solar plant similar to an Israeli one in the Negev desert that makes uses of heliotropic mirrors.
Our wishes and hopes, disappointments and sufferings have their source in instincts which are comparable to the light instinct of the heliotropic animals.
Hartman's readings of Wordsworth oscillate between "dark and light, or heliotropic or melantropic," extolling a poet who knew that to "deny imagination its darker food .
Along with the same line of argument and extending her metaphorical analogy, this implicit disposition is evident also in the contrast she establishes between "shooting star" (illustrating the amatory flash/narrative) and the "sunflower" (standing for the theological heliotropic narrative).
Protein levels may vary as a result of a light stimulus, as would be assumed in heliotropic leaf movement, or by a rhythm endogenous to the plant and at least partially independent of external stimuli, such as daily nyctinastic leaf folding of S.
Worse still, by responding to nothing more than light emanating from numerous screens, we are more like photosensitive or heliotropic plants.
A heliotropic skin eruption and Gottron's papules are considered pathognomic for dermatomyositis, but these can be tricky.
Byatt and the Heliotropic Imagination (2004), although these two studies do not focus exclusively on Byatt's short fiction.