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round-arch

round-arch Arch.
  [round a. 17.]
  attrib. Characterized by arches of a semicircular or rounded form, as in the Romanesque style.

1840 Penny Cycl. XVI. 275/1 There is quite as much dissimilarity as resemblance between the Lombardic or round-arch style of Italy and that of this country. 1853 Ruskin Stones Ven. II. vi. 215 Romanesque: Round-arch Architecture. Never thoroughly developed until Christian times. a 1878 Scott Lect. Archit. (1879) I. 18 The round-arch variety [was perfected] in the twelfth century.

Oxford English Dictionary

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