A set of consecutive, adjacent items of similar type; normally a bit string or a character string.

A piece of pipe, casing, or other down-hole drilling equipment coupled together and lowered into a borehole.

A very small vein, either independent or occurring as a branch of a larger vein. Also known as stringer.

A solid body whose length is many times as large as any of its cross-sectional dimensions, and which has no stiffness.

A proposed structure for elementary particles, consisting of a one-dimensional curve with zero thickness and length typically of the order of the Planck length, 10^-35 m.