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multivallate

multivallate, a.
  (mʌltɪˈvæleɪt, -ət)
  [f. multi- + vallate a.]
  Having encircling ramparts which form multiple lines of defence. Cf. bivallate a. Also multivaˈllation.

1948 Archaeol. Jrnl. CV. 50 The best developed barbicans are found in multivallate camps. 1954 Bull. Board Celtic Stud. XV. 74 Multivallate ‘camps’ with various types of lateral or oblique entrance. 1963 [see bivallate a.]. 1963 E. S. Wood Collins Field Guide Archaeol. ii. ii. 169 The chief areas of multivallation are the south-west..and Wessex.

Oxford English Dictionary

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