| BOMBPROOFING | • bombproofing v. Present participle of bombproof. • BOMBPROOF v. to make proof against bombs.
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| BRONCHOSPASM | • bronchospasm n. (Medicine) difficulty in breathing due to a contraction of smooth muscle in the walls of the bronchi and bronchioles. • BRONCHOSPASM n. constriction of the air passages of the lung (as in asthma) by spasmodic contraction of the bronchial muscles.
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| IMPONDERABLE | • imponderable adj. Not ponderable; without sensible or appreciable weight; incapable of being weighed. • imponderable adj. Difficult or impossible to comprehend or evaluate.
 • imponderable n. (Physics) An imponderable substance or body; specifically, in the plural, a name formerly applied to…
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| IMPONDERABLY | • imponderably adv. In an imponderable manner. • IMPONDERABLE adv. not ponderable.
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| IMPRISONABLE | • imprisonable adj. Capable of being imprisoned. • imprisonable adj. (Law, of an offence) Carrying a sentence of imprisonment.
 • IMPRISONABLE adj. capable of being imprisoned.
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| IMPROBATIONS | • improbations n. Plural of improbation. • IMPROBATION n. in Scots law, an action for the purpose of declaring some instrument false or forged.
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| INCOMPARABLE | • incomparable adj. So much better than another as to be beyond comparison; matchless or unsurpassed. • incomparable adj. (Rare) Not able to be compared.
 • incomparable n. Something beyond compare; a thing with which there is no comparison.
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| INCOMPARABLY | • incomparably adv. In an incomparable manner. • INCOMPARABLE adv. eminent beyond comparison.
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| MARIMBAPHONE | • marimbaphone n. (Obsolete, music) A kind of percussion idiophone, like the marimba, but with either wooden or steel… • MARIMBAPHONE n. a marimba.
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| OMBUDSPERSON | • ombudsperson n. A person of any gender who performs the function historically defined by the term ombudsman. | 
| PARASYMBIONT | • parasymbiont n. (Biology) A parasymbiotic symbiont. • PARASYMBIONT n. a partner in parasymbiosis.
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| POLYEMBRYONY | • polyembryony n. (Botany) The production of two or more embryos in one seed, due either to the existence and fertilization… • polyembryony n. (Biology) The production of two or more embryos from a single fertilized egg.
 • POLYEMBRYONY n. the condition of having several embryos.
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| PROTHROMBINS | • prothrombins n. Plural of prothrombin. • PROTHROMBIN n. a protein-like substance present in blood plasma.
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| PULMOBRANCHS | • PULMOBRANCH n. a lung-book. |