Where does “declinational” come from?
declinational (English) comes from English declination, from Middle English declinacioun, from Middle French declination, from Latin dēclīnātiō, from Latin -ātiō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus — small stone, pebble; gravel, rubble.
declinational (English): Relating to declination
Ancestry of “declinational”, step by step