Noun oscitance has 2 senses
  1. oscitancy, oscitance - drowsiness and dullness manifested by yawning
    --1 is a kind of sleepiness, drowsiness, somnolence; dullness, dulness, obtuseness
  2. yawn, yawning, oscitance, oscitancy - an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom; "he could not suppress a yawn"; "the yawning in the audience told him it was time to stop"; "he apologized for his ostinancy"
    --2 is a kind of reflex, instinctive reflex, innate reflex, inborn reflex, unconditioned reflex, physiological reaction
    --2 has particulars: pandiculation
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