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Webster 1913 Edition

Adj.

[Gr. [GREEK] thick, crowded + [GREEK], [GREEK], a shield.]

(Zool.)

Having the posterior side of the tarsus covered with small irregular scales; – said of certain birds.

pycnaspidean ‎(not comparable)

(zoology, of birds) Having the posterior side of the tarsus covered with small irregular scales.