hairy vetch
- n European vetch much cultivated as forage and cover crops
haematite
- n the principal form of iron ore; consists of ferric oxide in crystalline form; occurs in a red earthy form
hadrian
- n Roman Emperor who was the adoptive son of Trajan; travelled throughout his empire to strengthen its frontiers and encourage learning and architecture; on a visit to Britain in 122 he ordered the construction of Hadrian's Wall (76-138)
hadrian's wall
- n an ancient Roman wall built by Hadrian in the 2nd century; marked the northern boundary of the Roman Empire in Britain
hadron
- n any elementary particle that interacts strongly with other particles
hadrosaur
- n any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
hadrosaurus
- n any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
haecceity
- n the essence that makes something the kind of thing it is and makes it different from any other
haeckel
- n German biologist and philosopher; advocated Darwinism and formulated the theory of recapitulation; was an exponent of materialistic monism (1834-1919)
haem
- n a complex red organic pigment containing iron and other atoms to which oxygen binds