英文字典中文字典Word104.com

The Collaborative International Dictionary of English v.0.48 (gcide)

adit \ad"it\ ([a^]d"[i^]t), n. [L. aditus, fr. adire, aditum, to
go to; ad ire to go.]
1. An entrance or passage. Specifically: The nearly
horizontal opening by which a mine is entered, or by which
water and ores are carried away; -- called also {drift}
and {tunnel}.
[1913 Webster]

2. Admission; approach; access. [R.]
[1913 Webster]

Yourself and yours shall have
Free adit. --Tennyson.
[1913 Webster]


Tunnel \Tun"nel\ (t[u^]n"n[e^]l), n. [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}.]
1. A vessel with a broad mouth at one end, and a pipe or tube
at the other, for conveying liquor, fluids, etc., into
casks, bottles, or other vessels; a funnel.
[1913 Webster]

2. The opening of a chimney for the passage of smoke; a flue;
a funnel.
[1913 Webster]

And one great chimney, whose long tunnel thence
The smoke forth threw. --Spenser.
[1913 Webster]

3. An artificial passage or archway for conducting canals,
roads, or railroads under elevated ground, for the
formation of roads under rivers or canals, and the
construction of sewers, drains, and the like.
[1913 Webster]

4. (Mining) 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.
[1913 Webster]

{Tunnel head} (Metal.), 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 end 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.
[1913 Webster]


Tunnel \Tun"nel\, v. i.
To make a tunnel; as, to tunnel under a river.
[PJC]


Tunnel \Tun"nel\, v. t. [imp. & p. p. {Tunneled}
(t[u^]n"n[e^]ld) or {Tunnelled}; p. pr. & vb. n. {Tunneling}
or {Tunnelling}.]
[1913 Webster]
1. To form into a tunnel, or funnel, or to form like a
tunnel; as, to tunnel fibrous plants into nests. --Derham.
[1913 Webster]

2. To catch in a tunnel net.
[1913 Webster]

3. To make an opening, or a passageway, through or under; as,
to tunnel a mountain; to tunnel a river.
[1913 Webster]