Pronunciation: - ˌ graf
Function: noun
Etymology: International Scientific Vocabulary, from Greek pl ē thysmos increase, from pl ē thynein to increase, from pl ē thys mass, quantity, from pl ē thein
Date: 1872
: an instrument for determining and registering variations in the size of an organ, limb, or part resulting from changes in the amount of blood present or passing through it
– ple · thys · mo · graph · ic \ - ˌ thiz-m ə - ' gra-fik \ adjective
– ple · thys · mo · graph · i · cal · ly \ -fi-k( ə -)l ē \ adverb
– pleth · ys · mog · ra · phy \ ˌ ple-thiz- ' mä-gr ə -f ē \ noun