A miner's underground working time or shift.
A piece of ferromagnetic material (e.g., soft iron), inside the windings of an electromagnet, that channels the magnetic field.
The bony process which forms the central axis of the horns in many animals.
The set of feasible allocations that cannot be improved upon by a subset (a coalition) of the economy's agents.
A tiny sample of organic material obtained by means of a fine-needle biopsy.
An atomic nucleus plus inner electrons (i.e., an atom, except for its valence electrons).
A deposit paid by the purchaser of a rebuilt part, to be refunded on return of a used, rebuildable part, or the returned rebuildable part itself.
A disorder of sheep caused by worms in the liver.
The portion of a mold that creates an internal cavity within a casting or that makes a hole in or through a casting.
Used to designate the main and most diverse monophyletic group within a clade or taxonomic group.
The anatomical core, muscles which bridge abdomen and thorax.
An individual computer processor, in the sense when several processors (called cores or CPU cores) are plugged together in one single integrated circuit to work as one (called a multi-core processor).
The central part of a protein's structure, consisting mostly of hydrophobic amino acids.
A cylindrical sample of rock or other materials obtained by core drilling.
The heart or inner part of a physical thing.
The most important part of a thing or aggregate of things wherever located and whether of any determinate location at all; the essence.
The central fissile portion of a fission weapon.
A hollow cylindrical piece of cardboard around which a web of paper or plastic is wound.
The center or inner part of a space or area.
The central part of a fruit, containing the kernels or seeds.
The inner part of a nuclear reactor, in which the nuclear reaction takes place.
The material between surface materials in a structured composite sandwich material.
To cut or drill through the core of (something).
To remove the core of an apple or other fruit.
To extract a sample with a drill.
Forming the most important or essential part.
The ground plan of a work or works.
The intersection of a plane of projection, or an original plane, with a coordinate plane.
The sum of the diagonal elements of a square matrix.
An empty category occupying a position in the syntactic structure from which something has been moved, used to explain constructions such as wh-movement and the passive.
A residue of some substance or material.
An enquiry sent out for a missing article, such as a letter or an express package.
A connecting bar or rod, pivoted at each end to the end of another piece, for transmitting motion, especially from one plane to another; specifically, such a piece in an organ stop action to transmit motion from the trundle to the lever actuating the stop slider.
A mark left as a sign of passage of a person or animal.
An act of tracing.
A very small amount.
One of two straps, chains, or ropes of a harness, extending from the collar or breastplate to a whippletree attached to a vehicle or thing to be drawn; a tug.
An informal road or prominent path in an arid area.
A current-carrying conductive pathway on a printed circuit board.
To follow the execution of the program by making it to stop after every instruction, or by making it print a message after every step.
To draw or sketch lightly or with care.
To follow the trail of.
To follow the history of.
To copy onto a sheet of paper superimposed over the original, by drawing over its lines.