棘螺栓

Bat \Bat\ (b[a^]t), n. [OE. batte, botte, AS. batt; perhaps fr.
the Celtic; cf. Ir. bat, bata, stick, staff; but cf. also F.
batte a beater (thing), wooden sword, battre to beat.]
1. A large stick; a club; specifically, a piece of wood with
one end thicker or broader than the other, used in playing
baseball, cricket, etc.

2. In badminton, tennis, and similar games, a racket.
[Webster 1913 Suppl.]

3. A sheet of cotton used for filling quilts or comfortables;
batting.

4. A part of a brick with one whole end; a brickbat.
[1913 Webster +PJC]

5. (Mining) Shale or bituminous shale. --Kirwan.

6. A stroke; a sharp blow. [Colloq. or Slang]
[Webster 1913 Suppl.]

7. A stroke of work. [Scot. & Prov. Eng.]
[Webster 1913 Suppl.]

8. Rate of motion; speed. [Colloq.] ``A vast host of fowl . .
. making at full bat for the North Sea.'' --Pall Mall Mag.
[Webster 1913 Suppl.]

9. A spree; a jollification. [Slang, U. S.]
[Webster 1913 Suppl.]

10. Manner; rate; condition; state of health. [Scot. & Prov.
Eng.]
[Webster 1913 Suppl.]

{Bat bolt} (Machinery), a bolt barbed or jagged at its butt
or tang to make it hold the more firmly. --Knight.