doppler shift

NOUN /dɑplər_ʃɪft/
13 LETTERS · STARTS WITH D

doppler shift is a valid 13-letter word worth 23 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
D2O1P3P3L1E1R1S1H4I1F4T1
2 + 1 + 3 + 3 + 1 + 1 + 1 + 0 + 1 + 4 + 1 + 4 + 1 =23 PTS
DOUBLE WORD → 46TRIPLE WORD → 69
MEANING

What does doppler shift mean?

NOUN · 1 SENSE
1

Change in the apparent frequency of a wave as observer and source move toward or away from each other.