(medicine) Any of a group of hereditary defects in the ability of some phagocytes to kill certain bacteria; the resulting infection

(set phrase, figuratively) Used as a reminder or warning regarding an impending deadline.

Christmas season; Christmastide; yuletide

(chemistry) A form of chromatography in which the stationary phase has pores that allow separation of molecules having different sizes and shapes

gas-liquid chromatography

(chemistry) A form of chromatography in which the mobile phase is a gas and the stationary phase is a liquid, usually on small beads packed in a long column

(chemistry) A form of thin layer chromatography in which a stationary phase consisting of silica coated with silver nitrate is used to separate cis- and trans- fatty acid derivatives

To plate a metal with a layer of chromium

plated with a layer of chromium

(physics) A minor stable isotope of chromium, ⁵³₂₄Cr, having 24 protons and 29 neutrons; it amounts to about 9% of the element in nature