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?a1425 tr. Guy de Chauliac (N.Y. Acad. Med.) f. 87v (MED) And centynodia [?c1425 Paris centinodia; L. centinodia] is praised of Arnolde.
?a1450 (Stockh.) (1950) 144 (MED) Centenodium is an herbe þat men clepe centenodye [a1450 Royal centinodie] or sparwystungge or swynys grees.
1526 cccxlviii. sig. Tivv/2 (heading) Sentynode, swynes grasse, knotgrasse, or sparowe tongue.
1611 R. Cotgrave Herbe nouée, Centinodie, Knotgrasse.
1662 R. Bunworth (ed. 2) xvii. 48 Use then astringent gargarismes made of Pilosella Myrtles, Centinody, orange flowers, and mel rosarum.
1723 tr. J. C. A. Helvétius 197 Some little Time after this strengthening Purge, the Patient must begin with Draughts made up of Plantain, Centinodium [Fr. Centinode], Barley Cinnamon Waters, and the Absorbents abovementioned.
1863 R. C. A. Prior 43 Centinode, or Centynody, hundred knot, from its many joints.
1945 33 117 There are 14–16 British species [of Polygonum] grouped in four sections:..3. Avicularia (Centinode).
2007 G. Hatfield 210 When gathered, the stem [of knotgrass] normally breaks at a joint, a characteristic that has given rise to such names as ‘ninety-knot’ and ‘centinode’.