[hee-lee-uh-stat] /ˈhi li əˌstæt/
an instrument consisting of a mirror moved by clockwork, for reflecting the sun’s rays in a fixed direction.
an astronomical instrument used to reflect the light of the sun in a constant direction
[hee-lee-oh-tak-sis] /ˌhi li oʊˈtæk sɪs/ noun, Biology. 1. movement of an organism toward or away from sunlight. /ˌhiːlɪəʊˈtæksɪs/ noun 1. movement of an entire organism in response to the stimulus of sunlight
[hee-lee-oh-ther-uh-pee] /ˌhi li oʊˈθɛr ə pi/ noun 1. treatment of disease by means of sunlight. /ˌhiːlɪəʊˈθɛrəpɪ/ noun 1. the therapeutic use of sunlight
[hee-lee-uh-trohp, heel-yuh- or, esp. British, hel-yuh-] /ˈhi li əˌtroʊp, ˈhil yə- or, esp. British, ˈhɛl yə-/ noun 1. any hairy plant belonging to the genus Heliotropium, of the borage family, as H. arborescens, cultivated for its small, fragrant purple flowers. 2. any of various other plants, as the valerian or the winter heliotrope. 3. any […]
[hee-lee-uh-troh-pin, hee-lee-o-truh-pin] /ˌhi li əˈtroʊ pɪn, ˌhi liˈɒ trə pɪn/ noun 1. . /ˌhiːlɪˈɒtrəpɪn/ noun 1. another term for piperonal