critical apparatus

18 LETTERS · STARTS WITH C

critical apparatus is a valid 18-letter word worth 25 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3R1I1T1I1C3A1L1A1P3P3A1R1A1T1U1S1

3 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 0 + 1 + 3 + 3 + 1 + 1 + 1 + 1 + 1 + 1 =25 PTS

DOUBLE WORD → 50TRIPLE WORD → 75

MEANING

What does critical apparatus mean?