| ASTROBOTANIES | • ASTROBOTANY n. the branch of botany that investigates the possibility that plants grow on other planets. |
| BACTERIOSTATS | • bacteriostats n. Plural of bacteriostat. • BACTERIOSTAT n. an agent that causes bacteriostasis. |
| BIOTERRORISTS | • bioterrorists n. Plural of bioterrorist. |
| BOOTSTRAPPERS | • bootstrappers n. Plural of bootstrapper. |
| BOTTLEBRUSHES | • bottlebrushes n. Plural of bottlebrush. • bottle␣brushes n. Plural of bottle brush. • BOTTLEBRUSH n. an Australian flower. |
| BREASTSTROKER | • breaststroker n. (Swimming) A person swimming using the breaststroke. • BREASTSTROKER n. one who swims using breaststroke. |
| BREASTSTROKES | • breaststrokes n. Plural of breaststroke. • breaststrokes v. Third-person singular simple present indicative form of breaststroke. • BREASTSTROKE n. a swimming-stroke performed breast-down, with circling movements of the arms and a froglike movement of the legs. |
| COUNTERBLASTS | • counterblasts n. Plural of counterblast. • COUNTERBLAST n. a defiant pronouncement or denunciation. |
| CRISTOBALITES | • cristobalites n. Plural of cristobalite. • CRISTOBALITE n. a variety of silica. |
| ERYTHROBLASTS | • erythroblasts n. Plural of erythroblast. • ERYTHROBLAST n. a cell in bone marrow that develops into an erythrocyte. |
| OBSTETRICIANS | • obstetricians n. Plural of obstetrician. • OBSTETRICIAN n. one who specialises in the care of women during pregnancy. |
| OBSTREPERATES | • obstreperates v. Third-person singular simple present indicative form of obstreperate. • OBSTREPERATE v. (Sterne) to make an unruly noise. |
| POSTPUBERTIES | • POSTPUBERTY n. the period after puberty. |
| SPERMATOBLAST | • spermatoblast n. (Dated) A spermatocyte. • SPERMATOBLAST n. a sperm-producing cell. |
| STILBOESTROLS | • stilboestrols n. Plural of stilboestrol. • STILBOESTROL n. a synthetic oestrogen, also STILBESTROL. |
| SUBREPTITIOUS | • subreptitious adj. Obsolete form of surreptitious. • SUBREPTITIOUS adj. fraudulently obtained; surreptitious. |
| TENEBROSITIES | • TENEBROSITY n. darkness. |
| TORSIBILITIES | • TORSIBILITY n. the ability to be twisted or subjected to torsion. |
| TROUBLESHOOTS | • troubleshoots v. Third-person singular simple present indicative form of troubleshoot. • TROUBLESHOOT v. to solve problems. |