1. A cord or tapelike tissue that connects or holds structures together.
See: bundle; ligament; tract
2. Any appliance that encircles and applies pressure around a body part or structure.
3. A segment of a myofibril.
4. A metal strip or seamless band for attaching orthodontic appliances to teeth.
5. An immature, unsegmented neutrophil seen in some illnesses on a peripheral blood smear. An increase in bands indicates that all mature neutrophils have been released from the bone marrow, usually during severe inflammation or infection, and that the marrow is releasing immature cells.

Subentries:
A band
H band
I band
iliotibial band
isotropic band