serrenoeud

ser·re·no·eud

(ser'ĕ-nō-ūd'),
An instrument for tightening a ligature.
[Fr. serrer, to press, + noeud, knot]

serrenoeud

(sār-nŭd′) [Fr. serrer, to squeeze, + noeud, knot]
A device for tightening ligatures, esp. those placed on vessels in a deep cavity out of reach of the fingers.