| BULLETPROOF | • bulletproof adj. (Of a material) Capable of withstanding a direct shot by a bullet fired from a gun. • bulletproof adj. (Idiomatic) Reliable, infallible, sturdy or error-tolerant. • bulletproof adj. (Usually of an idea or concept) Unbreakable, very tough. |
| FLUOROPHORE | • fluorophore n. (Biochemistry) A molecule or functional group which is capable of fluorescence. • FLUOROPHORE n. a chemical group responsible for fluorescence. |
| FLUOROSCOPE | • fluoroscope n. (Now rare) A device used to measure the fluorescence of a solution. • fluoroscope n. (Medicine) A device used to view continuous live X-ray images on a fluorescent screen. • fluoroscope v. (Transitive) To examine with a fluoroscope. |
| FLUOROTYPES | • fluorotypes n. Plural of fluorotype. • FLUOROTYPE n. (obsolete) photography by means of fluorides. |
| FOETIPAROUS | • foetiparous adj. Alternative form of fetiparous. • FOETIPAROUS adj. of marsupials, such as the kangaroo, giving birth to incompletely developed offspring, also FETIPAROUS. |
| OUTPERFORMS | • outperforms v. Third-person singular simple present indicative form of outperform. • OUTPERFORM v. to exceed in performance. |
| PROFOUNDEST | • profoundest adj. Superlative form of profound: most profound. • PROFOUND adj. very deep. |
| PROLIFEROUS | • proliferous adj. Producing many offspring; prolific or proliferative. • proliferous adj. (Botany) producing many buds or offshoots from leaves or flowers. • proliferous adj. (Zoology) reproducing by budding. |
| PUSSYFOOTED | • pussyfooted v. Simple past tense and past participle of pussyfoot. • PUSSYFOOT v. to tread softly or lightly to avoid being noticed; to act cautiously or noncommittally. |
| PUSSYFOOTER | • pussyfooter n. One who pussyfoots. • PUSSYFOOTER n. one who pussyfoots. |
| RUSTPROOFED | • rustproofed v. Simple past tense and past participle of rustproof. • RUSTPROOF v. to make resistant to rust, such as by applying a coating. |
| TEASPOONFUL | • teaspoonful n. A unit of capacity equal to the amount a teaspoon can hold which is taken approximately as 5 ml. • TEASPOONFUL n. the contents of a teaspoon. |