📚 Evection, noun. 🔉 /ɪˈvɛkʃn/ 🇬🇧 ❓ Definition (Astronomy • mass noun): Regular variation in the eccentricity of the moon's orbit around the earth, caused mainly by the sun's attraction. ❗️ Examples: No examples. ━━━━━━━━━━━━━ 🌀 @cambridge_dic