| z | a quantity of no importance |
|---|---|
| z | a mathematical element that when added to another number yields the same number |
| z | adjust (as by firing under test conditions) the zero of (a gun) |
| z | to adjust to zero value, of an instrument or device |
| z | indicating the absence of any or all units under consideration |
| z | indicating an initial point or origin |
| z | having no measurable or otherwise determinable value |
| z | of or relating to the null set (a set with no members) |
| z | a bond (corporate or government) that is issued at a deep discount from its value at maturity and pays no interest during the life of the bond |
| z | the time set for the start of an action or operation |
| z | adjust (as by firing under test conditions) the zero of (a gun) |
| z | direct onto a point or target, esp. by automatic navigational aids |