1. Bent in different directions; wreathed; twisted; winding; as, a tortuous train; a tortuous train; a tortuous leaf or corolla. The badger made his dark and tortuous hole on the side of every hill where the copsewood grew thick. (Macaulay)
3. Injurious: tortious.
4. (Science: astronomy) oblique; applied to the six signs of the zodiac (from Capricorn to gemini) which ascend most rapidly and obliquely. Infortunate ascendent tortuous. (Chaucer) Tortuously, Tortuousness.
Origin: OE. Tortuos, L.tortuosus, fr.tortus a twisting, winding, fr. Torquere, tortum, to twist: cf. F. Tortueux. See Torture.
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... nanocomposites, but without loss of ductility. Water-vapor permeability is reduced by 5x at only 6 vol percent silicate, as a result of the more tortuous path required for gas molecules to penetrate the membrane. We also plan to discuss issues regarding these materials in blood- contacting applications, ...
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