Lewis & Short

somnĭcŭlōsus, a, um, adj. [somnus], full of sleep, i. e.

  1. I. Pass., inclined to sleep, drowsy, dozy, sleepy, sluggish, slothful (rare but class.; cf. sopitus): quae vitia non sunt senectutis, sed inertis, ignavae, somniculosae senectutis, Cic. Sen. 11, 36: villicus, Col. 11, 1, 13: genus mancipiorum (with socors), id. 1, 8, 2: glires, Mart. 3, 58, 36: Etesiae, Sen. Q. N. 5, 11, 1.
  2. II. Act., making sleepy, drowsy, or sluggish: aspis, i. e. causing torpor or numbness, palsying, deadly (cf. somnifer and somnificus), Cinna ap. Gell. 9, 12, 12; Laber. ap. Non. 172, 30 (Com. Fragm. 86 Rib.).
    Adv.: somnĭ-cŭlōsē (acc. to I.), sleepily, lazily, sluggishly: persequi eri imperia, Plaut. Am. 2, 1, 75: agere aliquid, id. Capt. 2, 1, 31.