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British wall builder, 7 letters

Emperor nicknamed Little Greek, 7 letters

Emperor with a wall, 7 letters

He built the Temple of Venus and Roma, 7 letters

Roman emperor who visited Britain, 7 letters

Roman wall-builder, 7 letters

Trajan's successor, 7 letters

Roman Emperor who was the adoptive son of Trajan, 7 letters

Travelled throughout his empire to strengthen its frontiers and encourage learning and architecture, 7 letters

On a visit to Britain in 122 he ordered the construction of Hadrian's Wall (76-138), 7 letters

Pope whose negotiations with Charlemagne fixed the boundaries of the Papal States, 8 letters

___ Wall, 8 letters

Notable wall in England, 8 letters

Noted Roman structure in England, 12 letters

Elementary particle, 6 letters

Large ___ Collider (CERN particle accelerator), 6 letters

Subatomic particle, 6 letters

Subatomic particle in a collider, 6 letters

Any elementary particle that interacts strongly with other particles, 6 letters

Elementary particles, 7 letters

Was able to fit something in, 7 letters

Extinct duck-billed beast, 9 letters

Any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet, 9 letters

May have been partly aquatic, 9 letters

Duck-billed dinosaurs, 13 letters

Upper Cretaceous, 13 letters

May have been partly aquatic, 11 letters

Any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet, 11 letters

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