arteriosclerosis

NOUN /ɑr,tirioʊsklə'roʊsɪs/
16 LETTERS · 7 SYLLABLES · STARTS WITH A

arteriosclerosis is a valid 16-letter word worth 18 points in Scrabble and 20 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
A1R1T1E1R1I1O1S1C3L1E1R1O1S1I1S1
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =18 PTS
DOUBLE WORD → 36TRIPLE WORD → 54
MEANING

What does arteriosclerosis mean?