The term 'lemma' comes from the practice in Greco-Roman antiquity of using the word to refer to the headwords of marginal glosses in scholia; for this reason, the Ancient Greek plural form is sometimes used, namely lemmata (Greek λῆμμα, pl. λήμματα).

A third form of marginalia that provides information is the scholium. Often referred to using the plural scholia

cyclo[18]carbon

colibactin

Nafion by-product 2