What does "sextodecimo" mean?

A size of a sheet of paper resulting from folding and cutting a sheet of paper into sixteenths (3.25"–5" x 5"–6.25").

What is a synonym for "sextodecimo"?

Common synonyms include: crown, folio, imperial, medium, quarto, royal.

noun

noun ·Rare ·Advanced level

Noun

1
A size of a sheet of paper resulting from folding and cutting a sheet of paper into sixteenths (3.25"–5" x 5"–6.25").
2
A book consisting of pages of that size.

From Latin ablative of sextusdecimus (“sixteenth”).