(physics) The lightest and most common isotope of hydrogen, having a single proton and no neutrons: ¹₁H / An atom of this isotope.

(inorganic chemistry) The salt LiPF₆ that is used as an electrolyte in lithium batteries

A set of symbols and marks which are used to clarify meaning in text by separating strings of words into clauses, phrases and sentences. / An act of punctuating.

(pathology, virology) Of, pertaining to, or caused by an arbovirus.