plural of tunnel rat

(informal) A soldier trained to enter enclosed enemy spaces like tunnel systems to search them and eliminate and/or capture any occupants.

(physics) A semiconductor diode that has negative resistance in the forward direction of its operating range due to quantum effects.

plural of bridge-and-tunneler

(New York City, slang, derogatory) One who travels to Manhattan via bridge or tunnel from surrounding communities.

Having or characterised by tunnel-vision.

A carnival dark ride for couples in boats, either relaxing and romantic, or spooky (encouraging the couple to cling to one another). / (slang) The vagina.

A restricted field of vision as the result of looking through some type of object or a medical condition.

(quantum mechanics) Any of several quantum mechanical effects in which a particle disobeys the laws of classical mechanics.

(physics) The transmission of light through apertures of dimension smaller than the wavelength of the light by quantum tunnelling