a. [f. L. butyrum butter + -ACEOUS: cf. F. butyracé.]

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  1.  Of the nature of butter; buttery.

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1668.  Phil. Trans., III. 887. Milk … whence, and from the three parts whereof, viz. Butyraceous, Serous, and Caseous … he would deduce the different nature of the Humors and Spirits composing the blood.

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1778.  Anat. Dialogues, 6. Q.  What is the pinguedo, or fat?
  A.  It is an oleaginous or butyraceous matter secreted from the blood.

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1844.  T. Graham, Dom. Med., 174. Whey is the watery saccharine part of milk, freed in a great measure from the butyraceous and caseous matters.

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  fig.  1870.  Lowell, Study Wind., 249. If repugnance for having fine phrases take the place of butyraceous principle.

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  2.  Producing or containing butter.

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1863.  R. Burton, Abeokuta, I. 324. The varieties of butyraceous nuts are almost wholly unknown. Ibid. (1876), Gorilla L., I. 220. The Nje or Njeve, a towering butyraceous tree.

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