Where does “subtrajectory” come from?
subtrajectory (English) comes from English trajectory, from New Latin trāiectōria, from Latin trāiectus, from Latin trāiciō, from Latin trāditiō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus — small stone, pebble; gravel, rubble.
subtrajectory (English): A subset of a trajectory
Ancestry of “subtrajectory”, step by step