| DIPHTHONGALLY | • diphthongally adv. By means of a diphthong. • DIPHTHONGAL adv. of or like a diphthong. |
| HELMINTHOLOGY | • helminthology n. (Zoology) The branch of zoology related to the study of helminths (parasitic worms). • HELMINTHOLOGY n. the study of parasitic worms. |
| HIEROGLYPHIST | • hieroglyphist n. One versed in hieroglyphs. • HIEROGLYPHIST n. a person skilled in hieroglyphics. |
| HONEYMONTHING | • HONEYMONTH v. (obsolete) to spend one's honeymoon, also HONEYMOON. |
| HYETOGRAPHIES | • HYETOGRAPHY n. the study of rainfall distribution. |
| HYPNOBIRTHING | • hypnobirthing n. The use of hypnotherapy to ease the process of childbirth. • HYPNOBIRTHING n. the use of hypnotic technique during labour by an expectant mother to reduce the pain and emotional stress of delivery. |
| HYPOGNATHISMS | • HYPOGNATHISM n. the state of being hypognathous. |
| HYPOTHECATING | • hypothecating v. Present participle of hypothecate. • HYPOTHECATE v. to pledge as security without title or possession. |
| HYPOTHESISING | • hypothesising v. Present participle of hypothesise. • HYPOTHESISE v. to form a hypothesis, also HYPOTHESIZE, HYPOTHETISE, HYPOTHETIZE. |
| HYPOTHESIZING | • hypothesizing v. Present participle of hypothesize. • HYPOTHESIZE v. to make a hypothesis, also HYPOTHESISE, HYPOTHETISE, HYPOTHETIZE. |
| HYPOTHETISING | • hypothetising v. Present participle of hypothetise. • HYPOTHETISE v. to form a hypothesis, also HYPOTHESISE, HYPOTHESIZE, HYPOTHETIZE. |
| HYPOTHETIZING | • hypothetizing v. Present participle of hypothetize. • HYPOTHETIZE v. to form a hypothesis, also HYPOTHESISE, HYPOTHESIZE, HYPOTHETISE. |
| ICHTHYOLOGIES | • ICHTHYOLOGY n. the study of fish. |
| ICHTHYOLOGIST | • ichthyologist n. An expert in ichthyology: one who studies fishes. • ICHTHYOLOGIST n. one who studies ichthyology. |
| MYTHOGRAPHIES | • mythographies n. Plural of mythography. • MYTHOGRAPHY n. the descriptive study or representation of myths. |
| ONYCHOPHAGIST | • onychophagist n. (Rare) A person who bites his or her fingernails. • ONYCHOPHAGIST n. one who bites their fingernails. |
| OPISTHOGRAPHY | • opisthography n. A writing upon the back of anything, as upon the back of a sheet already written upon on one side. • OPISTHOGRAPHY n. inscribing on the back as well as the front. |
| PHOTOGLYPHIES | • PHOTOGLYPHY n. photography by photoglyph. |
| PHYTOGRAPHIES | • PHYTOGRAPHY n. descriptive botany. |