[f. as prec. + -ING2.] That clamps or holds fast together; as in clamping screw, clamping arc. (perh. vbl. sb.)
1837. Goring & Pritchard, Microgr., 8. The clamping screw (h), and the adjusting screw (i).
1857. Henfrey, Elem. Bot., 17. The clamping roots of Ivy-stems.
1867. J. Hogg, Microsc., I. ii. 70. The clamping arc, peculiar to Ross’s microscopes, fixes the microscope at any inclination.
