1. In a manner relating to or using heliometry; by means of measuring distances or angles using the sun or solar observations.
Usage: technical; astronomy; rare

Examples

• The astronomer determined the star's distance heliometrically using solar parallax measurements.
• Early surveyors worked heliometrically to establish baseline measurements across vast territories.
• The distance was calculated heliometrically by observing the sun's position relative to the celestial object.