Lewis & Short

argūtŭlus, a, um, adj. dim. [id.].

  1. * I. A little noisy, talkative, or loquacious (v. argutus, A. 2. a.): famula, App. M. 1, p. 117, 20.
  2. II. Somewhat subtle, acute, keen (v. argutus, B. 1.): libri, Cic. Att. 13, 18.