The Collaborative International Dictionary
                    Hamulus
                    
                        
                
                                                                    Hamulus \Ham"u*lus\ (-l[u^]s), n.; pl. Hamuli (-l[imac]). [L., a little hook.]
- (Anat.) A hook, or hooklike process. 
- (Zo["o]l.) A hooked barbicel of a feather. 
Wiktionary
                    hamulus
                    
                        
                
                                                                    n. 1 (context anatomy English) A hook, or hooklike process. 2 (context zoology English) A hooked barbicel of a feather.
Wikipedia
                    Hamulus
                    
                        
                
                                                                    Hamus, hamulus, and words derived from them are morphological or anatomical terms in various branches of biology. They describe structures functioning as, or in the form of, hooks or hooklets.