| NURTURABLE | • nurturable adj. Able to be nurtured. • NURTURABLE adj. that can be nurtured. |
| SUBANGULAR | • subangular adj. (Geology) Slightly angular; having rather blunt angles. • SUBANGULAR adj. slightly angular. |
| SUBNATURAL | • subnatural adj. (Physics) Describing spectroscopic lines that are narrower than those produced naturally. • subnatural adj. Below or beneath nature. • SUBNATURAL adj. almost natural. |
| SUBNUCLEAR | • subnuclear adj. (Physics) Smaller than or occurring in an atomic nucleus. • subnuclear adj. (Biology) Smaller than or occurring in a cell nucleus. • SUBNUCLEAR adj. of, relating to, or being a particle smaller than the atomic nucleus. |
| TUBULARIAN | • tubularian n. (Zoology) Any hydroid belonging to the former suborder Tubularida. • tubularian adj. Hydriform in a tubular shape with wide disc. • TUBULARIAN n. any hydroid belonging to the suborder Tubularida. |
| UNARGUABLE | • unarguable adj. Not arguable; that cannot be reasonably argued against. • unarguable n. Such a situation. • UNARGUABLE adj. that cannot be disputed. |
| UNARGUABLY | • unarguably adv. Not subject to question or doubt. • UNARGUABLE adv. that cannot be disputed. |
| UNBURNABLE | • unburnable adj. That is difficult or impossible to burn. • UNBURNABLE adj. that cannot be burned. |
| UNCURBABLE | • uncurbable adj. Incapable of being curbed. • UNCURBABLE adj. not capable of being curbed. |
| UNILOBULAR | • unilobular adj. Having a single lobe or lobule. • UNILOBULAR adj. having one lobule. |
| UNLABOURED | • unlaboured adj. (British spelling) Not laboured. • UNLABOURED adj. not laboured, also UNLABORED. |
| UNRUFFABLE | • unruffable adj. (Archaic) imperturbable. • UNRUFFABLE adj. (Dickens) imperturbable. |
| UNTURNABLE | • unturnable adj. Not turnable. • UNTURNABLE adj. that cannot be turned. |