nonmalignant tumour

NOUN
19 LETTERS · STARTS WITH N

nonmalignant tumour is a valid 19-letter word worth 23 points in Scrabble and 33 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
N1O1N1M3A1L1I1G2N1A1N1T1T1U1M3O1U1R1
1 + 1 + 1 + 3 + 1 + 1 + 1 + 2 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 3 + 1 + 1 + 1 =23 PTS
DOUBLE WORD → 46TRIPLE WORD → 69
MEANING

What does nonmalignant tumour mean?