• (a.) Thin; slender; small; minute. • (a.) Rare; subtile; not dense; -- said of fluids. • (a.) Lacking substance, as a tenuous argument. Found on http://thinkexist.com/dictionary/meaning/tenuous/
Ten'u·ous adjective [ Latin tenuis thin. See Thin , and confer Tenuis .] 1. Thin; slender; small; minute. 2. Rare; subtile; not dense; -- said of fluids. Found on http://www.encyclo.co.uk/webster/T/28