Английский разговорный словарь (основной) - ferrule
Ferrule
ferrule
ˈferu:l n. (also ferrel) 1 a ring or cap strengthening theend of a stick or tube. 2 a band strengthening or forming a joint. [earlier verrel etc. f. OF virelle, virol(e), f. L viriola dimin. of viriae bracelet: assim. to L ferrum iron]