1. The total weight of all living things in a given area: Biomaterial refers to the complete weight of the members of a biotic community, of a species population, or of a habitat, and can be a measure of total biotic productivity.
2. The total weight of the organic substance (as plankton) or organisms in a given area: Biomaterial can be measured as volume, mass (live, dead, dry, ash-free weight), or energy (calories), or as a standing crop.
3. Material that can safely be implanted into the human body and left there without causing an adverse reaction: At the hospital, the biomaterial, as a heart, can be used to save a person's life.
4. A plastic, fabric, or other material used to construct an implantable prosthesis and chosen for its biocompatibility: Dr. Smart was happy to receive the perfect biomaterial, an artificial joint, for his patient.