a person using or skilled in rhythm or one having a good sense of rhythm
rhythmist in American English
(ˈrɪðmɪst)
noun
1.
a person versed in or having a fine sense of rhythm
2.
a person who uses rhythm, esp. in a skilled way
a film editor who is a good rhythmist
Word origin
[1860–65; rhythm + -ist]This word is first recorded in the period 1860–65. Other words that entered Englishat around the same time include: big brother, institutionalism, jumping jack, monism, trade name-ist is a suffix of nouns, often corresponding to verbs ending in -ize or nouns ending in -ism, that denote a person who practices or is concerned with something, or holds certainprinciples, doctrines, etc. Other words that use the affix -ist include: Thomist, apologist, dramatist, novelist, realist