English Noun isopter (plural isopters) A line on a graph or diagram showing places of equal visual acuity Any termite of the infraorder Isoptera Translations termite Italian: isottero (it) Anagrams ropiest, periost, Potiers, portise, periots, positer, riposte, porites, Prietos, reposit, Epirots, prostie Wikiwand - on Seamless Wikipedia browsing. On steroids.