Ophthalmology. sty2 .
a small cyst on the eyelid resulting from chronic inflammation of a meibomian gland Also called meibomian cyst
small tumor in the eyelid, 1708, from Greek khalazion, diminutive of khalaza “hail, hailstone; small lump or knot; pimple,” from PIE root *gheled- “hail.”
Mineralogy. blue vitriol. noun a blue secondary mineral consisting of hydrated copper sulphate in triclinic crystalline form. Formula: CuSO4.5H2O
a microcrystalline, translucent variety of quartz, often milky or grayish. noun (pl) -nies a microcrystalline often greyish form of quartz with crystals arranged in parallel fibres: a gemstone. Formula: SiO2 n. c.1300, from Latin calcedonius, in Vulgate translating Greek khalkedon in Rev. xxi:19, found nowhere else. Connection with Chalcedon in Asia Minor “is very doubtful” […]
an ancient city in NW Asia Minor, on the Bosporus, opposite Byzantium. Council of, the ecumenical council held there in a.d. 451.
any of numerous small flies of the family Chalcididae, often having bright metallic coloration, the larvae of which are chiefly parasitic on various stages of other insects. noun any tiny hymenopterous insect of the family Chalcididae and related families, whose larvae are parasites of other insects