ppl. a. (UN-1 8.)

1

1756.  F. Home, Exper. Bleaching, 89. If … the oil of vitriol remains, in some parts, undiluted, the cloth is corroded into holes.

2

1791.  Cowper, Odyss., IX. 343. When thus the Cyclops … had quaff’d Much undiluted milk.

3

1860.  Piesse, Lab. Chem. Wonders, 14. An atmosphere of undiluted oxygen.

4

1873.  Rolfe, Phys. Chem., 159. A concentrated solution of … undiluted blood.

5