arc-second التعريفات والمعاني == English == === Noun === arc-second (plural arc-seconds) Alternative form of arcsecond. === Anagrams === decacorns شارك هذه المقالة: Facebook Twitter WhatsApp LinkedIn كلمات ذات صلة arc seconds arc-seconds arc second arcsecond arcseconds arc secant arc secants at second hand arcsecant