dowse dauz, v. Also dowze, douse. [Derivation unknown; app. a dialect term.] intr. To use the divining- or dowsing-rod in search of subterraneous supplies of water or mineral veins.

Hence

'dowsing vbl. sb.;

dowser dau.z<e>r, one who uses the divining-rod, a water-diviner;

dowsing-rod, the rod or twig used by dowsers.

1691 Locke Lower. Interest 40 Not of the nature of the deusing-rod, or virgula divina, able to discover mines of gold and silver.
1838 Mrs. Bray Tradit. Devonsh. III. 260 The superstition relative to the dowsing or divining rod, and the dowsers themselves, is too well known to be noticed here.
1865 R. Hunt Pop. Rom. W. Eng. Ser. i. Introd. 20 The divining or dowzing rod is certainly not older than the German miners, who were brought over by Queen Elizabeth to teach the Cornish to work their mines.
1869 Eng. Mech. 31 Dec. 380 1 The `dowsing' or `divining' rod is a forked stick of some fruit-bearing wood, generally hazel, held by the extremity of each prong of the fork in a peculiar way.
1888 Standard 22 Dec., These authorities [Hastings Board of Guardians] lately invoked the aid of a `Dowser', or water diviner, to tell them where to sink a well.
1894 Daily News 28 Dec. 5/2 The dry summer of 1893 brought the Divining Rod forward..`dowsers' sought for water with the mystic `twig', and, very often, found it.
1894 Daily News, 28 Dec. 5/2 Instances are adduced of ladies who have tried..and found that they could `dowse'.