ˈthick-ˌkneedadj. having thick knees; esp. in thick-kneed bustard or thick-kneed plover, the Stone Curlew.
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thick-kneed1776
1776 T. PennantBrit. Zool. (ed. 4, octavo) I. ii. 287 Bustard..Thick-kneed.
1840 [see main sense].
1893 A. Newton et al. Dict. Birds: Pt. 1 129 The Curlew of inlanders, or Stone-Curlew—called also..most wrongly..the Thick-knee or Thick-kneed Bustard.