What does "jelly" mean?

Jelly: The juice of fruits or meats boiled with sugar to an elastic consistence; as, currant jelly; calf's-foot jelly. Jelly bag, a bag through which the material for jelly is strained. -- Jelly mold, a mold for forming jelly in ornamental shapes. -- Jelly plant (Bot.), Australian name of an edible seaweed (Eucheuma speciosum), from which an excellent jelly is made. J. Smith. -- Jelly powder, an explosive, composed of nitroglycerin and collodion cotton; -- so called from its resemblance to calf's-foot jelly.