The Collaborative International Dictionary
Sagenitic
Sagenitic \Sag`e*nit"ic\, a. (Min.) Resembling sagenite; -- applied to quartz when containing acicular crystals of other minerals, most commonly rutile, also tourmaline, actinolite, and the like.
Wiktionary
sagenitic
a. (context mineralogy English) Resembling sagenite; applied to quartz when containing acicular crystals of other minerals, most commonly rutile.