D defs.my
Entry 3 senses Webster, 1913

Tenuous

/tĕn'-yəw-əs/ · Ten·u·ous · IPA /ˈtɛn.ju.əs/
01 a. Thin; slender; small; minute.
  1. 1.
    Thin; slender; small; minute.
  2. 2.
    Rare; subtile; not dense; -- said of fluids.
  3. 3.
    Lacking substance, as a tenuous argument.