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(countable, botany, also figuratively) A plant with flowers which turn to face and follow the sun, such as (archaic) marigolds and sunflowers.
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(uncountable) The fragrance of Heliotropium arborescens flowers, or a scent resembling this fragrance.
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(uncountable) A light purple or violet colour like that of Heliotropium arborescens flowers.
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(countable) An instrument that uses a mirror to reflect sunlight for purposes such as signalling, or (surveying) triangulation (where the reflected light is detected by another surveyor positioned some distance away).
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(countable, historical) An ancient type of sundial consisting of a bowl with a perpendicular gnomon mounted in the centre.
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(countable, uncountable, mineralogy) Synonym of bloodstone (“a green chalcedony that is sprinkled with red spots or veins of hematite”)