mailing-card

English Thesaurus

1. a card for sending messages by post without an envelope (noun.communication)

hypernym	:	card,
definition	:	a rectangular piece of stiff paper used to send messages (may have printed greetings or pictures) (noun.communication)

hyponym	:	lettercard,
definition	:	a postcard that folds so the message is inside (noun.communication)

hyponym	:	picture postcard,
definition	:	a postcard with a picture on one side (noun.communication)