| BACTERIOPHAGES | • bacteriophages n. Plural of bacteriophage. • BACTERIOPHAGE n. a bacterium that eats other bacteria.
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| BRANCHIOSTEGAL | • branchiostegal adj. (Zoology) Of or pertaining to the operculum that covers the gill slits of fish. • branchiostegal n. A branchiostegal ray.
 • BRANCHIOSTEGAL adj. of or relating to the operculum covering the gill slits of fish.
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| DAUGHTERBOARDS | • daughterboards n. Plural of daughterboard. • DAUGHTERBOARD n. a small circuit board that can be attached to the motherboard of a computer.
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| GERONTOPHOBIAS | • GERONTOPHOBIA n. a fear of old age or of growing old. | 
| HYDROBIOLOGIST | • hydrobiologist n. A biologist whose speciality is hydrobiology. • HYDROBIOLOGIST n. a student of hydrobiology.
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| HYPNOBIRTHINGS | • HYPNOBIRTHING n. the use of hypnotic technique during labour by an expectant mother to reduce the pain and emotional stress of delivery. | 
| MATCHBOARDINGS | • MATCHBOARDING n. matchboards collectively. | 
| NEIGHBOURLIEST | • NEIGHBOURLY adj. like a neighbour, also NEIGHBORLY. | 
| OVERBREATHINGS | • overbreathings n. Plural of overbreathing. • OVERBREATHING n. hyperventilation.
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| THOROUGHBASSES | • thoroughbasses n. Plural of thoroughbass. • THOROUGHBASS n. esp. in baroque music, a bass part underlying a piece.
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| THOROUGHBRACES | • thoroughbraces n. Plural of thoroughbrace. • THOROUGHBRACE n. any of several leather straps supporting the body of a carriage and serving as springs.
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| THYROGLOBULINS | • thyroglobulins n. Plural of thyroglobulin. • THYROGLOBULIN n. an iodine-containing protein of the thyroid gland that is the precursor of thyroxine and triiodothyronine.
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| TOOTHBRUSHINGS | • toothbrushings n. Plural of toothbrushing. • TOOTHBRUSHING n. the action of using a toothbrush to clean teeth.
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| TURBOCHARGINGS | • TURBOCHARGING n. the act of fitting with a turbocharger. |