earbud
Synonym discussion
Sense: noun/1
Earbud is the everyday term for small speakers worn inside the ear, now usually wireless and paired with a phone. Earphone is a broader, slightly older word that covers both in-ear and on-ear devices, including the wired single earpiece that came with early mobile phones. Headphone nearly always describes larger padded speakers connected by a band over the head, though casual speakers sometimes use it loosely for earbuds. In-ear monitor (IEM) is the professional term for high-fidelity earbuds that seal the ear canal, used by performers on stage. In daily speech, choose earbud for the small portable ones most people carry, and headphone for the over-ear kind.
Common collocations
Etymology
Formed from ear and bud (suggesting something small and compact, like a flower bud). The word appeared in the late 20th century as portable cassette and CD players became popular, replacing bulkier over-ear headphones for everyday use.