porcelain
Synonym discussion
Sense: noun/1
'Ceramic' is the broad umbrella word: it covers many things made from baked clay, including tiles, bowls, and art pieces. 'Porcelain' is a narrower word for a hard, smooth, often white material that is usually finer and more delicate in appearance. 'China' often overlaps with 'porcelain', but in everyday English it more often points to fine tableware such as cups, plates, and tea sets. 'Stoneware' is also strong baked clay, but it is thicker, heavier, and usually less translucent than porcelain. 'Earthenware' is more porous and less refined, often with a rustic feel. So a museum may display Ming porcelain, a family may keep good china for guests, and a kitchen may use stoneware bowls every day.
Etymology
English 'porcelain' came through French from Italian 'porcellana'. In Italian, that word was first used for a smooth, shiny cowrie shell, and later for this material because its white surface reminded people of the shell. As the fine ceramic became widely known in Europe, the shell name stayed with the new material and the objects made from it.