In-tér'ea-lar or In-tér'ea-la-ry, a.

(Synop., § 130), a. [Lat. intercalaris and intercalarius, from intercalare; It. intercalare, intercalario, Sp. intercalar, Fr. intercalaire. See infra.] Inserted or introduced in the midst of others; as, an intercalary verse;—applied particularly to the odd day (Feb. 29th) inserted in leap-year.

Intercalary day (Med.), one on which no paroxysm of an intermittent disease occurs. Mayne.