| BRONDYRONS | • BRONDYRON n. (Spenser) a brand, a sword. | 
| COSMOTRONS | • cosmotrons n. Plural of cosmotron. • COSMOTRON n. a large synchrotron used for accelerating protons to high energies.
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| CUPFERRONS | • CUPFERRON n. a compound used in chemical analysis. | 
| CYCLOTRONS | • cyclotrons n. Plural of cyclotron. • CYCLOTRON n. a type of particle accelerator.
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| DECELERONS | • decelerons n. Plural of deceleron. • DECELERON n. a type of aileron.
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| EPHEMERONS | • EPHEMERON n. something of short lifetime. | 
| MAGNETRONS | • magnetrons n. Plural of magnetron. • MAGNETRON n. a vacuum tube combined with a magnetic field to deflect electrons.
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| MELLOTRONS | • mellotrons n. Plural of mellotron. • MELLOTRON n. (tradename) an electronic keyboard instrument programmed to produce the tape-recorder sounds of orchestral instruments.
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| PERCHERONS | • Percherons n. Plural of Percheron. • PERCHERON n. (French) a draught-horse of a breed originating in La Perche in Normandy.
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| PHYTOTRONS | • phytotrons n. Plural of phytotron. • PHYTOTRON n. an apparatus that produces climates artificially for the study of plant growth.
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| RESNATRONS | • resnatrons n. Plural of resnatron. • RESNATRON n. a high-power, high-frequency tetrode.
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| SEMANTRONS | • semantrons n. Plural of semantron. • SEMANTRON n. (Greek) a wooden or metal bar struck with a mallet, used instead of a bell in Orthodox churches.
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| SIGMATRONS | • SIGMATRON n. a machine generating high-potential X-rays. | 
| SUBMICRONS | • submicrons n. Plural of submicron. • SUBMICRON n. a particle visible by ultramicroscope but not by the ordinary microscope.
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| THYRATRONS | • thyratrons n. Plural of thyratron. • THYRATRON n. a gas-filled valve with a heated cathode, able to carry very high currents.
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| TIERCERONS | • tiercerons n. Plural of tierceron. • TIERCERON n. a subordinate rib springing from the intersection of two other ribs.
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| TRIHEDRONS | • trihedrons n. Plural of trihedron. • TRIHEDRON n. a solid figure with three plane surfaces meeting at a point.
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