1700, "a distiller" (in colloquial rum-dropper), agent noun from drop (v.). Meaning "small tube from which liquid may be made to fall in drops" is by 1889.
she used an eye dropper to administer medication to the eyes
droopy
drop
drop-kick
droplet
drop-out
dropper
dropping
dropsical
dropsy
drosophila
dross
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