English
gravitaxis
From gravi- + taxis.
Proto-Indo-European *gʷreh₂- ‘heavy’
Proto-Indo-European *gʷréh₂us ‘heavy’
Proto-Italic *gʷraus ‘heavy’
Latin gravis ‘heavy’
Latin gravitās ‘weight, heaviness’
English gravi-
Proto-Indo-European *teh₂g- ‘to order, to establish, to rule’
Proto-Hellenic *tat͏̌t͏̌ō
Ancient Greek τᾰ́σσω ‘I arrange”, “I order’
Ancient Greek τάξις ‘arrangement, order’
English taxis
Today it means
noun movement in the direction of higher or lower gravitational field
Language periods are conventional ranges, not dates for this word.
Etymograph / gravitaxis