from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Pertaining to an object composed of bone and aponeurosis; at the end of a muscle where it becomes tendon.
From the Latin osseus ("bone"), and Ancient Greek ἀπό (apo, "from, away from") plus νεῦρον (neuron, "sinew, tendon"), literally translated as "the end of the muscle where it becomes tendon". (Wiktionary)