| HEORTOLOGIST | • heortologist n. A person who studies heortology. • HEORTOLOGIST n. one who practises heortology, the study of religious feasts. |
| ORTHODONTIAS | • ORTHODONTIA n. the rectification of crookedness in the teeth, also ORTHODONTICS. |
| ORTHODONTICS | • orthodontics n. (Medicine) A specialty of dentistry concerned with correcting misalignment of teeth. • ORTHODONTICS n. the rectification of crookedness in the teeth, also ORTHODONTIA. |
| ORTHODONTIST | • orthodontist n. An orthodontic dentist. • ORTHODONTIST n. one who practises orthodontics. |
| ORTHOPTEROID | • orthopteroid n. (Entomology) Any of the insects historically included in the order Orthoptera, including the cockroaches… • ORTHOPTEROID n. a member of the Orthoptera, cockroaches. |
| ORTHOTONESIS | • orthotonesis n. The accentuation of a proclitic or enclitic. • ORTHOTONESIS n. accentuation of a proclitic or enclitic, as opposed to enclisis. |
| ORTHOTROPIES | • ORTHOTROPY n. the state of being orthotropic, growing along a vertical axis. |
| ORTHOTROPISM | • orthotropism n. The property of being orthotropic or orthotropous. • ORTHOTROPISM n. vertical growth. |
| PHOTOTROPHIC | • phototrophic adj. (Biology) That exhibits phototrophy. • PHOTOTROPHIC adj. relating to phototropism, movement directed by light. |
| PHOTOTROPIES | • PHOTOTROPY n. change of colour due to wavelength of incident light. |
| PHOTOTROPISM | • phototropism n. (Biology) The movement of a plant towards or away from light. • PHOTOTROPISM n. movement directed by light. |
| PROTOHISTORY | • protohistory n. The period between prehistory and history, during which a culture or civilization has not yet developed… • PROTOHISTORY n. the study of human beings in the times that immediately antedate recorded history. |
| PROTOTROPHIC | • prototrophic adj. (Biology) Of or pertaining to a prototroph or to prototrophy. • PROTOTROPHIC adj. of bacteria, feeding directly on uncombined elements. |
| TRAITORHOODS | • TRAITORHOOD n. the state of being a traitor. |
| TRICHOTOMOUS | • trichotomous adj. Divided into three parts, or into threes; forking three ways. • trichotomous adj. (Set theory) Such that, for all x and y in X, and for a binary relation R, exactly one of xRy, yRx or x=y holds. • TRICHOTOMOUS adj. divided into three parts. |
| TROPHOBIOTIC | • trophobiotic adj. Of or pertaining to trophobiosis. • TROPHOBIOTIC adj. relating to trophobiosis, mutual exchange of nutriment in symbiosis. |
| TROPHOTROPIC | • trophotropic adj. Relating to trophotropy. • TROPHOTROPIC adj. related to trophotropism, direction of growth by nutritional factors. |
| TROPHOZOITES | • trophozoites n. Plural of trophozoite. • TROPHOZOITE n. in Protozoa, the trophic phase of an adult. |
| WITHOUTDOORS | • withoutdoors adv. (Archaic) outdoors. • WITHOUTDOORS adv. outdoors. |