uvalan.

1902 Geogr. Jrnl. 20 429 Dr. Cvijic̆'s researches have led him to consider the uvala (Karstmulde) as an intermediate form between doline and polye. The uvala is a large, broad sinking in the karst with uneven floor, formed by the breaking down of the wall between a series of dolines.

1921 Geogr. Rev. 11 600 As time goes on, the divisions between neighboring dolines are broken down; and larger depressions, called ‘uvalas’ or ‘ouvalas’, are created.

1922 Geol. Mag. 19 401 Several of the smaller..poljes of Southern Herzegovina..appear to result from the collapse of underground watercourses. To such depressions it would perhaps be better to restrict the use of the local Bosnian term ‘uvalas’.

1954 W. D. Thornbury Princ. Geomorphol. xiii. 323 The Bosnian term uvala is most commonly applied to the larger depressions resulting from the collapse of extensive roof sections over underground watercourses. What have been designated above as compound sinkholes are sometimes called uvalas, but this usage of the term does not seem justified.

1970 R. J. Small Study of Landforms iv. 152 In many areas closely adjoining sotchs have amalgamated, through lateral extension, to give larger depressions comparable with the ‘uvalas’ of the Karst proper.