acrocoracoid

from The Century Dictionary.

• noun In ornithology, a process or projection from the distal end and internal face of the coracoid, to which the clavicle is usually attached.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun anatomy A dorsal expansion of the coracoid bone which completes the opening for the triosseal canal.
• adjective Of or pertaining to this extension.