marginal

adj. [common] 1. [techspeak] An extremely small change. A marginal increase
in core can decrease GC time drastically. In everyday terms, this means that
it is a lot easier to clean off your desk if you have a spare place to put
some of the junk while you sort through it. 2. Of little merit. This
proposed new feature seems rather marginal to me. 3. Of extremely small
probability of win ning. The power supply was rather marginal anyway; no
wonder it fried.

