The Collaborative International Dictionary
Pegmatitic
Pegmatitic \Peg`ma*tit"ic\, a. (Min.) Of, pertaining to, or resembling, pegmatite; as, the pegmatic structure of certain rocks resembling graphic granite.
Wiktionary
pegmatitic
a. Containing or characteristic of pegmatite
Usage examples of "pegmatitic".
On Charon we found a perfect quartz crystal that weighed a thousand pounds in a pegmatitic formation.