Stadia hairs

Sta´di`a hairs

(stā´dĭ`å hârz)

1.(Surv.) In a theodolite, etc., horizontal cross wires or hairs equidistant from the central horizontal cross wire.

stadia hairs

[′stād·ē·ə ‚herz] (engineering) Two horizontal lines in the reticule of a theodolite arranged symmetrically above and below the line of sight. Also known as stadia wires.

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