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phymatin

ˈphymatin Chem.
  [f. Gr. ϕῦµα, ϕῡµατ-, phyma + -in1. Cf. F. phymatine.]
  An organic substance obtained from tubercle.

1847–9 Todd Cycl. Anat. IV. 107/1 Phymatin is described as a peculiar extractive matter.

Oxford English Dictionary

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