| HEPTATHLONS | • heptathlons n. Plural of heptathlon. • HEPTATHLON n. an athletic competition with seven events. |
| HEPTAVALENT | • heptavalent adj. (Chemistry) Having an atomic valence of 7. • heptavalent adj. (Medicine) Having a vaccine valence of 7. • HEPTAVALENT adj. having a valency of seven, also SEPTAVALENT, SEPTIVALENT. |
| LITHOPRINTS | • lithoprints n. Plural of lithoprint. • LITHOPRINT n. a print made by lithography. |
| MULTIPHOTON | • multiphoton adj. Involving multiple photons. • MULTIPHOTON adj. having many photons. |
| NOTAPHILIST | • notaphilist n. Someone who studies or collects paper money or banknotes. • NOTAPHILIST n. one who collects banknotes and cheques as a hobby. |
| PENTATHLETE | • pentathlete n. (Athletics) An athlete who competes in the pentathlon. • PENTATHLETE n. an athlete participating in a pentathlon. |
| PENTATHLONS | • pentathlons n. Plural of pentathlon. • PENTATHLON n. an athletic contest involving participation by each contestant in five different events. |
| PENTATHLUMS | • PENTATHLUM n. a pentathlon. |
| PLANCHETTES | • planchettes n. Plural of planchette. • PLANCHETTE n. a board mounted on two castors and a pencil-point, used as a medium for automatic writing and supposed spirit-messages. |
| PLECTOGNATH | • plectognath n. Any fish of the order Tetraodontiformes. • PLECTOGNATH n. any spiny-finned marine fish of the mainly tropical order Plectognathi, that includes puffers, triggerfish, trunkfish and sunfish. |
| POTLATCHING | • potlatching n. (Also attributively) gerund of potlatch. • potlatching v. Present participle of potlatch. • POTLATCH v. to exchange gifts. |
| TELEPATHING | • telepathing v. Present participle of telepath. • TELEPATH v. to read minds. |
| TELEPHONIST | • telephonist n. A telephone operator. • TELEPHONIST n. a telephone switchboard operator. |
| THIOPENTALS | • THIOPENTAL n. a truth drug, aka Pentothal. |