| BLASTOCOELS | • blastocoels n. Plural of blastocoel. • BLASTOCOEL n. the cavity inside a blastula, also BLASTOCOELE. |
| BLASTOPORES | • blastopores n. Plural of blastopore. • BLASTOPORE n. the opening of the archenteron in the gastrula that develops into the anus of some animals, also BLASTOPOR. |
| BLASTOSPORE | • blastospore n. (Mycology) A type of fungal spore produced asexually by budding. • BLASTOSPORE n. the orifice of a gastrula. |
| OBSERVATORS | • observators n. Plural of observator. • OBSERVATOR n. one who observes or takes notice. |
| OBSESSIONAL | • obsessional adj. Marked by obsession. • OBSESSIONAL adj. relating to obsession. |
| OSTEOBLASTS | • osteoblasts n. Plural of osteoblast. • OSTEOBLAST n. one of the protoplasmic cells from or around which the matrix of the bone is developed. |
| ROUSEABOUTS | • rouseabouts n. Plural of rouseabout. • ROUSEABOUT n. (Australian) an odd-job man on a sheep station, also ROUSTABOUT. |
| SCOREBOARDS | • scoreboards n. Plural of scoreboard. • SCOREBOARD n. a large board for displaying the score of a game or match. |
| SEBORRHOEAS | • SEBORRHOEA n. a morbidly increased discharge of sebaceous matter upon the skin, also SEBORRHEA. |
| SHADOWBOXES | • shadowboxes n. Plural of shadowbox. • shadowboxes v. Third-person singular simple present indicative form of shadowbox. • shadow-boxes n. Plural of shadow-box. |
| SHOWBOATERS | • showboaters n. Plural of showboater. • SHOWBOATER n. one who behaves in an ostentatious manner to show off. |
| SMOKEBOARDS | • smoke␣boards n. Plural of smoke board. • SMOKEBOARD n. a board suspended in front of a fireplace to prevent the smoke coming out into the room. |
| TABLESPOONS | • tablespoons n. Plural of tablespoon. • TABLESPOON n. a large spoon used esp. for serving. |
| TOBACCOLESS | • tobaccoless adj. Without tobacco. • TOBACCOLESS adj. without tobacco. |