What is "majusculae"

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.

n. capital letters, as found in manuscripts of the sixth century and earlier