OSCITANCY

oscitancy|oscitation. Oscitancy, or Oscitation, n. a yawning, carelessness

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Os″ci‐tan‐cy (?), n. [[See Oscitant.]] 1. 1. The act of gaping or yawning.
2. 2. Drowsiness; dullness; sluggishness. Hallam.
It might proceed from the oscitancy of transcribers. Addison.