petroseline,a.|ˈpɛtrəsɪlaɪn| [f. L. petroselīn-um, a. Gr. πετροσέλῑνον rock-parsley, f. πέτρα rock + σέλῑνον parsley.] Of or related to parsley. 1727S. Switzer Pract.Gard. vi. xlviii. 246 The apium, comprehending the whole of the petroseline family.1760J. Lee Introd.Bot.App. 322 Petroseline Wortle, Apium.