Elementarius, Adiect. Pertaining to letters, principles, or elements. vt. Elementariæ literæ. Iulius Capito. Letters of the crosse rewe.Elementarius senex. Se. An old mã learning his crosse rewe.
Lewis and Short: Latin dictionary
ĕlĕmentārĭus, a, um, adj. [elementum, II.], belonging to the elements or rudiments, elementary (post-Aug. and very rare): senex,