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Sefin:
A Turkish archer's thumb ring.

Self bow:
A bow made from one piece of wood.

Self nocked arrow:
An arrow that does not have a separate nock fitted, instead the nock is cut into the end of the shaft.

Serving:
A wrapping of thread that prevents wear on the bowstring.

Shaft:
The body of an arrow to which the nock, pile and fletchings are fitted.

Sheath of arrows:
A bundle of twenty four arrows.

Shooting line:
The line which archers stand astride when shooting, also a reference line for the various target distances.

Short bow:
A bow usually half the height of the archer using the bow.

Sight:
A device on the bow that allows the archer to take aim on the target.

Skirt:
The part of the target outside the scoring area.

Slur bow:
A crossbow with a barrel slotted on both sides for the string, dating from the early 16th century.

Speed shooting, Shower shooting:
A contest to fire as many arrows as possible into the air at one time.

Spent arrow:
An arrow that has travelled too far to be effective (usually resulting in a bouncer).

Spine:
The stiffness of an arrow shaft, measured by placing the shaft horizontally between two points 28 inches apart and hanging a two pound weight from the centre.  The spine is the deflection (in inches) at this central point.

Springbow:
A bow or crossbow set as a trap for animals.

Stabiliser:
A weight mounted on a bow to minimise undesirable torque of the bow string upon release.

Stacking:
A rapid increase in draw weight in the last few inches of draw.

Stave:
A piece of wood destined to be shaped into a bow.

Steelbow:
A bow made of steel, usually a flattened pipe (Europe) or a spring-like device (India)

Stele:
The wooden shaft of an arrow.

String:
[1] A bowstring.
[2] To fit a bow with a string.

Stringer:
[1] An aid to stringing a bow.
[2] A maker or seller of bowstrings.