…a young foreign person, typically a woman, who helps with housework or child care in exchange for room and board…
…a pair of complementary bases in a double-stranded nucleic acid molecule, consisting of a purine in one strand linked by hydrogen bonds to a pyrimidine in the other. Cytosine always pairs with guanine, and adenine with thymine (in DNA) or uracil (in RNA)…
…a pair of electrons occupying an orbital in an atom or molecule and not directly involved in bonding…
…(of an animal or person) form a close relationship through courtship and sexual activity with one other animal or person…
…a loosely bound pair of electrons with opposite spins and moving with the same speed in opposite directions, held to be responsible for the phenomenon of superconductivity…
…a pair of elements a, b having the property that (a, b) = (u, v) if and only if a = u, b = v…
…a cable consisting of two wires twisted around each other, used especially for telephone or computer applications…
…pincers with parallel, flat, and typically serrated surfaces, used chiefly for gripping small objects or bending wire…
…an instrument for weighing. Scales were originally simple balances (pairs of scales) but are now usually devices with an internal weighing mechanism housed under a platform on which the thing to be weighed is placed, with a gauge or electronic display showing the weight…
…a cutting instrument in which two blades move past each other, like scissors but typically larger…
…an instrument with two movable arms that are joined at one end, used for picking up and holding things…
…a device with an air bag that emits a stream of air when squeezed together with two handles, used for blowing air into a fire…
…a pair of pincers or tweezers used in surgery or in a laboratory…
…a tool made of two pieces of metal bearing blunt concave jaws that are arranged like the blades of scissors, used for gripping and pulling things…
…an instrument used for cutting cloth, paper, and other thin material, consisting of two blades laid one on top of the other and fastened in the middle so as to allow them to be opened and closed by a thumb and finger inserted through rings on the end of their handles…
…an outer garment covering the body from the waist to the ankles, with a separate part for each leg…
…a small instrument like a pair of pincers for plucking out hairs and picking up small objects…
…an optical instrument with a lens for each eye, used for viewing distant objects…
…an instrument for drawing circles and arcs and measuring distances between points, consisting of two arms linked by a movable joint, one arm ending in a point and the other usually carrying a pencil or pen…
…a pair of pincers or tweezers used in surgery or in a laboratory…
…pincers with parallel, flat, and typically serrated surfaces, used chiefly for gripping small objects or bending wire…
…a cutting instrument in which two blades move past each other, like scissors but typically larger…
…an instrument used for cutting cloth, paper, and other thin material, consisting of two blades laid one on top of the other and fastened in the middle so as to allow them to be opened and closed by a thumb and finger inserted through rings on the end of their handles…
…an outer garment covering the body from the waist to the ankles, with a separate part for each leg…
