onesie

From the Gerber Childrenswear brand name Onesies. The name became generic and was reinterpreted as a plural, hence the new singular and decapitalized "onesie". Equivalent to one +‎ -sie.[1]

• IPA^(key): /ˈwʌn.zi/
• Hyphenation: one‧sie

onesie (plural onesies)

1. Name given to a number of one-piece attires
   1. (US) A one-piece garment for an infant or small child, generally worn over a diaper.
   2. One-piece adult loungewear jumpsuit.
   3. One-piece fashionable streetwear worn mostly by teenagers.

• (a one-piece baby garment): romper, romper suit

• onesie-twosie

• eosine