2. To catch in a tunnel net.
Origin: Tunneled or Tunnelled; Tunneling or Tunnelling.
4. (Science: chemical) A level passage driven across the measures, or at right angles to veins which it is desired to reach; distinguished from the drift, or gangway, which is led along the vein when reached by the tunnel.
(Science: chemistry) Tunnel head, the top of a smelting furnace where the materials are put in. Tunnel kiln, a limekiln in which coal is burned, as distinguished from a flame kiln, in which wood or peat is used. Tunnel net, a net with a wide mouth at one [[en 68d d]] and narrow at the other. Tunnel pit, Tunnel shaft, a pit or shaft sunk from the top of the ground to the level of a tunnel, for drawing up the earth and stones, for ventilation, lighting, and the like.
Origin: F. Tonnelle a semicircular, wagon-headed vault, a tunnel net, an arbor, OF. Also tonnel; dim. Of tonne a tun; so named from its resemblance to a tun in shape. See Ton.