Pessulus
Pronunciation : Pes"su*lus
Part of Speech : n.;
Etymology : [L., a bolt.] (Anat.)
Definition : Defn: A delicate bar of cartilage connecting the dorsal and ventral extremities of the first pair of bronchial cartilages in the syrinx of birds.
pl. Pessuli.
Source : Webster's Unabridged Dictionary, 1913