'Patency' definitions:

Definition of 'patency'

(from WordNet)
noun
The openness (lack of obstruction) of a bodily passage or duct
noun
The property of being easy to see and understand [syn: obviousness, noticeability, noticeableness, patency]

Definition of 'Patency'

From: GCIDE
  • Patency \Pa"ten*cy\, n. [See Patent.]
  • 1. The condition of being open, enlarged, or spread. [1913 Webster]
  • 2. The state of being patent or evident. [1913 Webster]