[syn: yawn, yawning, oscitance, oscitancy]
The Collaborative International Dictionary of English v.0.48:
Oscitancy \Os"ci*tan*cy\, n. [See Oscitant.]
   [1913 Webster]
   1. The act of gaping or yawning.
      [1913 Webster]
   2. Drowsiness; dullness; sluggishness. --Hallam.
      [1913 Webster]
            It might proceed from the oscitancy of transcribers.
                                                  --Addison.
      [1913 Webster]
WordNet (r) 3.0 (2006):
oscitancy
    n 1: drowsiness and dullness manifested by yawning [syn:
         oscitancy, oscitance]
    2: 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 oscitancy" [syn:
       yawn, yawning, oscitance, oscitancy]