1956, from combining form of Latin sonus "sound" (from PIE root *swen- "to sound") + -gram. Related: Sonograph (1951).
son-in-law
sonless
sonnet
sonnetteer
sonny
sonogram
Sonora
sonority
sonorous
sook
soon
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}