missal capsn.Typographyrare a decorative style of initial letter printed with black-letter type.Apparently only attested in dictionaries or glossaries.
ΚΠ
1875 J. SouthwardDict. Typogr. (ed. 2) 91Missal caps, a style of fancy letter, used sometimes as initials to Old English or Black letter.
1960 G. A. GlaisterGloss. Bk. 258/2Missal caps, decorative capitals printed with black-letter type.