a. Weak or insubstantial; flimsy: a tenuous argument; a tenuous link between pieces of evidence.
b. Precarious or insecure: tenuous survival.
2. Long and thin; slender: tenuous strands.
3. Having a thin consistency: Pluto's tenuous envelope of gas.
[Latin tenuis; see ten- in the Appendix of Indo-European roots.]
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