| ABORTIONIST | • abortionist n. (Now sometimes offensive) A person who performs abortions, especially illegally or secretly. • abortionist n. (Chiefly derogatory) A person who advocates for or supports the legality of abortion. • ABORTIONIST n. one who induces abortions. |
| ANTIBOYCOTT | • antiboycott adj. Opposing or countering a boycott or boycotts. • ANTIBOYCOTT adj. opposed to boycott. |
| ANTITOBACCO | • antitobacco adj. Opposed to tobacco, often specifically to either the tobacco industry or public smoking. • ANTITOBACCO adj. opposed to the use of tobacco. |
| ASTROBOTANY | • astrobotany n. Synonym of xenobotany. • ASTROBOTANY n. the branch of botany that investigates the possibility that plants grow on other planets. |
| BOTHERATION | • botheration interj. A mild expression of annoyance or exasperation: bother! • botheration n. (Uncountable) The state of being bothered; annoyance, vexation. • botheration n. (Countable) An act of bothering or annoying. |
| BOTTOMLANDS | • bottomlands n. Plural of bottomland. • BOTTOMLAND n. (US) alluvial deposits. |
| ETHNOBOTANY | • ethnobotany n. (Botany, sociology) The scientific study of the relationships between people and plants. • ethnobotany n. (Pharmacology) The scientific study of traditional medicinal plants used by various ethnic groups. • ETHNOBOTANY n. the plant lore of indigenous cultures. |
| GEOBOTANIST | • geobotanist n. One who studies geobotany. • GEOBOTANIST n. a student of geobotany. |
| KATABOTHRON | • KATABOTHRON n. (Modern Greek) an underground water channel, also KATAVOTHRON. |
| NONBOTANIST | • nonbotanist n. One who is not a botanist. • NONBOTANIST n. one who is not a botanist. |
| OBSTIPATION | • obstipation n. Severe constipation caused by intestinal obstruction. • OBSTIPATION n. a severe and obstinate constipation. |
| OBTESTATION | • obtestation n. (Archaic) The act of obtesting; supplication; protestation. • OBTESTATION n. the act of obtesting. |
| OBTURATIONS | • obturations n. Plural of obturation. • OBTURATION n. an obstruction. |
| 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. |
| OUTBOASTING | • outboasting v. Present participle of outboast. • OUTBOAST v. to surpass in boasting. |
| TOBACCONIST | • tobacconist n. A person who sells tobacco, cigarettes, cigars, snuff and sundry items. • tobacconist n. A tobacconist’s shop. • tobacconist n. (Dated) A person who is addicted to smoking tobacco. |
| TOBOGGANIST | • tobogganist n. Someone who rides a toboggan. • TOBOGGANIST n. one who uses a toboggan, also TOBOGGANER. |