| IRRADIATORS | • irradiators n. Plural of irradiator. • IRRADIATOR n. something or someone that irradiates. |
| MORTARBOARD | • mortarboard n. A square board, with a handle, on which mortar or plaster is carried: a hawk. • mortarboard n. An academic cap that has a flat square top with a tassel. • MORTARBOARD n. a square-topped college cap. |
| PROTERANDRY | • proterandry n. (Botany) The condition of being proterandrous. • PROTERANDRY n. in a hermaphrodite organism, the maturation and loss of the male elements before the female elements develop. |
| RADIOTRACER | • radiotracer n. (Sciences) A radioactive tracer; a radiolabel. • RADIOTRACER n. a radioactive tracer. |
| RECHARTERED | • rechartered v. Simple past tense and past participle of recharter. • RECHARTER v. to charter again. |
| REDCURRANTS | • redcurrants n. Plural of redcurrant. • red-currants n. Plural of red-currant. • red␣currants n. Plural of red currant. |
| REDECORATOR | • redecorator n. One who redecorates. • REDECORATOR n. one who redecorates. |
| REFRACTURED | • refractured v. Simple past tense and past participle of refracture. • REFRACTURE v. to fracture again. |
| RETARDATORY | • retardatory adj. Retardant; delaying. • RETARDATORY adj. tending to retard. |
| RETROGRADED | • retrograded v. Simple past tense and past participle of retrograde. • RETROGRADE v. to cause to go back. |
| RETROGRADES | • retrogrades n. Plural of retrograde. • RETROGRADE v. to cause to go back. |
| SURTARBRAND | • surtarbrand n. Alternative form of surturbrand. • SURTARBRAND n. (Icelandic) a lignite found interbedded with lavas in Iceland, also SURTURBRAND. |
| SURTURBRAND | • surturbrand n. A fibrous brown coal or bituminous wood. • SURTURBRAND n. (Icelandic) a lignite found interbedded with lavas in Iceland, also SURTARBRAND. |
| TERRAFORMED | • terraformed v. Simple past tense and past participle of terraform. • TERRAFORM v. to make (another planet) earthlike. |
| THREADBARER | • threadbarer adj. (Rare) comparative form of threadbare: more threadbare. • THREADBARE adj. having the nap worn off so that the thread shows. |
| TRANSBORDER | • transborder adj. Beyond the border, on the other side of the border. |
| TRANSFERRED | • transferred v. Simple past tense and past participle of transfer. • TRANSFER v. to move from one place to another. |