a deep narrow hole especially one made in the earth to find water, oil, etc. capillary a tube of hair-like diameter carbohydrates any of a large group of energy-producing organic compounds containing carbon, hydrogen, and oxygen, starch glucose, and other sugars cave-in an accidental falling of a mine ceiling ceramics made of clay and permanently hardened by heat clot a thick mass of liquid hardened by blood, that is exposed to air coke- solid substance left after the gases have been extracted from coal colloidal a substance consisting of ultramicroscopic articles Commodore- the senior captain of a shipping line compound a mixture of two or more things currency money