jabber: noun, To talk rapidly and unintelligibly.
jumper: noun, 1. A one-piece garment consisting of an overall-like upper part and a skirt, joined at the waist. 2. A padded seat that hangs from a door frame with a clamp attached to three spring-loaded straps used as an infant exerciser.
jumpsuit: noun, A one-piece outer-garment, usually with long sleeves and legs with snapped seams at the legs and crotch.
kimono: A sleeved, robe-like garment that opens in the front. Usually ties at bottom with a drawstring.
kindergarten: noun, (US), a school that educates with games and toys children from the age of 3 to 6 years.
lapped shoulders/collar: a style typically used in infant T-shirt where the shoulders are formed by two pieces of overlapping fabric so that the collar can be opened fully by pulling the front and back of the collar open.
layette: A set of clothing and equipment for an infant. Usually consisting of gowns, slip-on shirts, snap side shirts, onesies, drooling bibs, washcloths, towel and booties when bought as a set. Generically; an infant's wardrobe.
leading strings: noun, ribbons or strips of cloth that were attached to the shoulder or back.
lingerie bag: noun, a zippered, mesh bag that can be used to protect plastic pants when machine-washing.