ternal
51triplex — Synonyms and related words: deltoid, fan shaped, tern, ternal, ternary, ternate, three, three in one, three ply, threefold, treble, triadic, trial, triangular, trilogic, trinal, trine, triple, triplicate, triune …
52triplicate — Synonyms and related words: Photostat, Xerox, clone, copy, counterpart, cube, ditto, double, dupe, duplicate, duplication, facsimile, hectograph, manifold, microcopy, microfilm, mimeo, mimeograph, model, multigraph, multiply by three,… …
53eternal triangle — e.ternal triangle n [singular] literary the difficult situation that occurs when two people have a sexual relationship with the same person …
54internal combustion engine — in.ternal com bustion .engine n an engine that produces power by burning petrol, used in most cars …
55internal medicine — in.ternal medicine n [U] AmE a type of medical work in which doctors treat illnesses that do not need operations …
56eternal triangle — e,ternal triangle noun singular a situation in which two people are both in love or having a sexual relationship with the same third person …
57fraternal twin — fra,ternal twin noun count an ordinary TWIN born at the same time as another baby from two different eggs. Two babies born from a single egg look a lot like each other and are called identical twins …
58internal clock — in,ternal clock noun count 1. ) a clock that is part of a computer or other machine 2. ) your BODY CLOCK …
59internal-combustion engine — in,ternal com bustion ,engine noun count a type of engine used in most cars …
60internal medicine — in,ternal medicine noun uncount medical treatment of the organs inside your body using methods that do not involve SURGERY (=cutting open the body) …