| BUTTONHOOKS | • buttonhooks n. Plural of buttonhook. • buttonhooks v. Third-person singular simple present indicative form of buttonhook. • BUTTONHOOK n. a hook for drawing small buttons through buttonholes. |
| BUTTONWOODS | • buttonwoods n. Plural of buttonwood. • BUTTONWOOD n. the American plane tree, a large tree, producing rough balls, from which it is named, also BUTTONBALL. |
| CONTORTIONS | • contortions n. Plural of contortion. • CONTORTION n. the state of being contorted. |
| COOPTATIONS | • cooptations n. Plural of cooptation. • co-optations n. Plural of co-optation. • COOPTATION n. the act of coopting, also COOPTION. |
| COROTATIONS | • corotations n. Plural of corotation. • COROTATION n. the act of rotating in conjunction with another body. |
| COTTONWOODS | • cottonwoods n. Plural of cottonwood. • COTTONWOOD n. an American tree of the poplar genus, having seeds covered with abundant cotton-like hairs. |
| GNOTOBIOTES | • gnotobiotes n. Plural of gnotobiote. • GNOTOBIOTE n. a germfree animal. |
| HOUNDSTOOTH | • houndstooth n. A two-colour fabric pattern of broken checks. • houndstooth n. Fabric with a houndstooth pattern; an item of clothing made with such fabric. |
| NOTODONTIDS | • notodontids n. Plural of notodontid. • NOTODONTID n. a member of the Notodontidae genus of moths. |
| ODONTOBLAST | • odontoblast n. A cell on the outer surface of dental pulp that produces tooth dentin. • ODONTOBLAST n. a tooth cell in the surface of dental pulp that produces dentine. |
| ODONTOCETES | • odontocetes n. Plural of odontocete. • ODONTOCETE n. a subdivision of Cetacea, including the sperm whale, dolphins, etc.; the toothed whales. |
| ODONTOLITES | • odontolites n. Plural of odontolite. • ODONTOLITE n. a fossil bone or tooth coloured blue with phosphate of iron, aka bone-turquoise. |
| ONTOLOGISTS | • ontologists n. Plural of ontologist. • ONTOLOGIST n. one who is versed in or treats of ontology. |
| OUTSHOOTING | • outshooting v. Present participle of outshoot. • OUTSHOOT v. to surpass in shooting. |
| POLYCOTTONS | • polycottons n. Plural of polycotton. • POLYCOTTON n. a synthetic fabric. |
| RONDOLETTOS | • rondolettos n. Plural of rondoletto. • RONDOLETTO n. a short rondo. |
| SOMATOTONIA | • SOMATOTONIA n. a pattern of temperament and body type in which alertness and aggression are combined with mesomorphic build. |
| SOMATOTONIC | • somatotonic adj. Designating a personality type characterised as aggressive and extroverted. • SOMATOTONIC n. a person who has an extroverted and aggressive personality type. |
| STROBOTRONS | • strobotrons n. Plural of strobotron. • STROBOTRON n. a gas-filled electron tube used esp. as a source of bright flashes of light for a stroboscope. |
| TROCHOTRONS | • TROCHOTRON n. a trochoidal magnetron, high-frequency counting tube which deflects a beam on to radially disposed electrodes. |