Source : Webster's Revised Unabridged Dictionary (1913)

Majusculae \Ma*jus"cu*l[ae]\, n. pl. [L., fem. pl. fr.
   majusculus somewhat greater or great, dim. of major, majus.
   See {Major}.] (Pal[ae]ography)
   Capital letters, as found in manuscripts of the sixth century
   and earlier.