In a manner relating to or based on attraction; according to the principles of gravitational or magnetic attraction.
From attraction + -al suffix + -ly adverb suffix. A scientific term formed from 'attraction' through standard English word-building patterns.
Newton used attraction to explain gravity, but this adverb is rare because scientists usually just say 'attractively' or use 'with attraction' instead—sometimes formal words sound too clunky to survive!
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