ANEROID

[an.er.oid] adj [F aneroide, fr. Gk a- + LGk neron water, fr. Gk, neut. of nearos, neros fresh; akin to Gk neos new--more at new] (ca. 1848): using no liquid; specif: operating by the effect of outside air pressure on a diaphragm forming one wall of an evacuated container "~ barometer"