a dense core found in molecular clouds which lead to the formation of stars

(electrical) Energy wasted by hysteresis or eddy currents in the core of an armature, transformer, etc.

plural of core sample

A cylindrical section of a naturally occurring substance, typically obtained by drilling into the substance, for example sediment or rock, with a core drill.

A core sample removed from an ice sheet, most commonly from the polar ice caps of Antarctica, Greenland or from high mountain glaciers elsewhere, the properties of which can be used to reconstruct a climatic record of a given area.

Singaporeans having birthright citizenship because they are descended from settlers in Singapore prior to independence in 1965.

(science fiction, computing) a computer processing center or central computer

(computing, historical) A type of non-volatile random-access rewritable electronic memory using ferrite cores to magnetically store binary digits (bits).

(science fiction, computing) A (semi-)permanent computer memory storage device that may be extracted, and may or may not be separate from the computer core.

(US) The Common Core State Standards Initiative, an effort to provide standards to evaluate achievement among US primary and secondary school students in basic subjects and thereby facilitate and motivate teaching of those subjects.