The Collaborative International Dictionary
Postclavicular
Postclavicle \Post*clav"i*cle\, n. [Pref. post- + clavicle.] (Anat.) A bone in the pectoral girdle of many fishes projecting backward from the clavicle. -- Post`*cla*vic"u*lar, a.
Wiktionary
postclavicular
a. posterior to the clavicle