 This was then interpreted as the genuine Arabic word "jayb", meaning "bosom, fold, bay", either by the Arabs or by a mistake of the European translators such as Robert of Chester, who translated "jayb" into Latin as "sinus".Particularly Fibonacci's "sinus rectus arcus" proved influential in establishing the term "sinus".The words "minute" and "second" are derived from the Latin phrases "partes minutae primae" and "partes minutae secundae".