The term 'egg holder' can be broken down into four crossword solutions: OVISAC (6 letters), SAC (3 letters), OVARY (5 letters), and NEST (4 letters). OVISAC is an archaic word for a sheepskin bag or pouch, which was used to carry eggs. SAC is a general term for a bag or pouch, and it can also refer to the reproductive organ of some animals, such as the ovary. OVARY is the female reproductive organ in which eggs are produced and stored. Finally, NEST is a structure built by birds or other animals to hold their eggs. All of these words can be used to describe an egg holder, which is a container used to store eggs.