TAENIDIUM
taenidium: translation
n.; pl. -nidia [L. dim. taenia, band or ribbon]
1. (ARTHROPODA: Chelicerata)
In Acari, a ribbon-like canal on the surface of the tegument.
2. (ARTHROPODA: Insecta)
A circular or spiral chitinous thickening, strengthening the inner wall of the trachea.