A boreal quillwort, Isoetes lacustris, native on both sides of the northern Atlantic Ocean.

A species of quillworts, Isoetes echinospora.

An analgesic drug.

(countable) Quillaja saponaria, the soapbark tree. / (uncountable) The bark of that tree.

plural of quillwork

(archaic) One who writes with a quill.

plural of quillman

plural of quillai

Alternative form of quillaia

A surname.