sounding rod

English

Noun

sounding rod (plural sounding rods)

1. A rod or piece of iron let down in a groove by a pump, used to ascertain the depth of water in a ship's hold.

   Synonym: sounding lead

2. A probe used in urethral sounding.
3. A sex toy consisting of a metal or plastic rod, generally with a ball at the end, which is inserted into the urethra.