I. -tə(r) noun
( -s )
: one that bursts: as
a. : a workman who breaks up stone with a light hammer
b. : an explosive charge used to break open and scatter the contents of chemical shells, bombs, and mines
c. : a heavy southerly gale accompanied by a sharp fall in temperature that occurs chiefly along the east coast of Australia
d. : an abnormally double flower (as of the carnation) in which the calyx splits or fragments
II. noun
1. : the celestial source of an outburst of radiation (as X rays)
2. : a machine that separates at perforations business forms produced and printed on one long sheet