Lewis & Short

ănancītes, ae, m., [ἀν- ἄγχω, to free from distress], a name of the diamond as a remedy for sadness and trouble of mind: adamas et venena vincit et lymphationes abigit metusque vanos expellit a mente. Ob id quidam eum ananciten vocavere, Plin. 37, 4, 15, § 61 Sillig, Jan; the old reading here was anachiten.