POSITIVE a.
ive crystals (Opt.), a doubly refracting crystal in which the index of refraction for the extraordinary ray is greater than for the ordinary ray, and the former is refracted nearer to the axis than the latter, as quartz and ice; -- opposed to negative crystal, or one in which this characteristic is reversed, as Iceland…
PRESS v.
To squeeze, in order to extract the juice or contents of; to squeeze out, or express, from something. From sweet kernels pressed, She tempers dulcet creams. Milton. And I took the grapes, and pressed them into Pharaoh's cup, and I gave the cup into Pharaoh's hand. Gen. xl. 11.