| HONEYMONTHED | • HONEYMONTH v. (obsolete) to spend one's honeymoon, also HONEYMOON. |
| HYPOGNATHISM | • hypognathism n. The property of being hypognathous. • HYPOGNATHISM n. the state of being hypognathous. |
| METHYLPHENOL | • METHYLPHENOL n. a type of aromatic organic compound, aka cresol. |
| MONOPHTHONGS | • monophthongs n. Plural of monophthong. • MONOPHTHONG n. two written vowels representing a single sound, e.g. 'oo', 'oa'. |
| NYCHTHEMERON | • nychthemeron n. A period of one day and one night, a date: in the West, this is a period of 24 consecutive hours. • NYCHTHEMERON n. (Greek) a full period of a day and night. |
| ORNITHOMORPH | • ornithomorph n. A figure in ancient art resembling a bird. • ORNITHOMORPH n. a figure or design in the form of a bird. |
| PHONESTHEMES | • phonesthemes n. Plural of phonestheme. |
| PHONESTHEMIC | • phonesthemic adj. Of or pertaining to a phonestheme. |
| PHOTOMACHINE | • PHOTOMACHINE n. a machine that prints copies of digital photographs. |
| PHYTOHORMONE | • phytohormone n. A plant hormone. • PHYTOHORMONE n. a plant hormone, regulating growth. |
| PYTHONOMORPH | • pythonomorph n. Any large extinct reptile of the taxon Pythonomorpha. • pythonomorph n. Any member of the taxon Pythonomorpha. • PYTHONOMORPH n. a large marine reptile of the Cretaceous period, with long, scaly body and paddle-shaped limbs. |
| THERMOHALINE | • thermohaline adj. Of, or relating to a combination of temperature and salinity. • thermohaline n. Thermohaline circulation. • THERMOHALINE adj. involving both temperature and salinity. |
| THERMOSIPHON | • thermosiphon n. An arrangement of siphon tubes for assisting circulation in a liquid. • THERMOSIPHON n. a method of circulating a cooling liquid through a system by using the slight difference in density between the hot and cool parts. |
| TROCHELMINTH | • trochelminth n. (Zoology, obsolete) Any member of the Trochelminthes. • TROCHELMINTH n. any invertebrate of the former taxonomic group Trochelminthes, which included the rotifers and gastrotrichs. |
| WITHHOLDMENT | • withholdment n. The act of withholding. • WITHHOLDMENT n. the act of withholding. |