| HYDROSULPHURIC | • hydrosulphuric adj. Alternative spelling of hydrosulfuric. • HYDROSULPHURIC adj. formed by a combination of hydrogen and sulphur. |
| HYPOCHONDRIUM | • hypochondrium n. (Anatomy) The upper region of the abdomen, below the lower ribs, each side of the epigastrium. • HYPOCHONDRIUM n. either of two regions of the upper part of the abdomen. |
| HYPOSULPHURIC | • hyposulphuric adj. Alternative spelling of hyposulfuric. • HYPOSULPHURIC adj. denoting a kind of acid. |
| ICHTHYODORULITE | • ichthyodorulite n. (Zoology) One of the spiny plates found on the back and tail of certain skates. • ichthyodorulite n. (Geology) A fossil fish-spine found in stratified rock. • ICHTHYODORULITE n. a fossilised fish-spine, also ICHTHYODORYLITE. |
| ICHTHYOFAUNA | • ichthyofauna n. The fish of a particular region. • ICHTHYOFAUNA n. the fish life of region. |
| ICHTHYOFAUNAE | • ichthyofaunae n. Plural of ichthyofauna. • ICHTHYOFAUNA n. the fish life of region. |
| ICHTHYOFAUNAL | • ichthyofaunal adj. Relating to ichthyofauna. • ICHTHYOFAUNAL adj. of or relating to ichthyofauna. |
| ICHTHYOFAUNAS | • ichthyofaunas n. Plural of ichthyofauna. • ICHTHYOFAUNA n. the fish life of region. |
| ICHTHYOLATROUS | • ichthyolatrous adj. Fish-worshipping. • ICHTHYOLATROUS adj. worshipping fish. |
| ICHTHYOPHAGOUS | • ichthyophagous adj. (Biology) feeding on fish. • ICHTHYOPHAGOUS adj. fish-eating. |
| ICHTHYOSAUR | • ichthyosaur n. Any of several fishlike marine reptiles of the extinct order Ichthyosauria of the early Triassic to… • ICHTHYOSAUR n. a large fossil marine reptile, also ICHTHYOSAURIAN, ICHTHYOSAURUS. |
| ICHTHYOSAURI | • ichthyosauri n. Plural of ichthyosaur. • ICHTHYOSAURUS n. a large fossil marine reptile, also ICHTHYOSAUR, ICHTHYOSAURIAN. |
| ICHTHYOSAURIAN | • ichthyosaurian adj. (Paleontology) Of or relating to the Ichthyosauria. • ichthyosaurian n. (Paleontology) Any of the Ichthyosauria; an ichthyosaur. • ICHTHYOSAURIAN n. a large fossil marine reptile, also ICHTHYOSAUR, ICHTHYOSAURUS. |
| ICHTHYOSAURIANS | • ichthyosaurians n. Plural of ichthyosaurian. • ICHTHYOSAURIAN n. a large fossil marine reptile, also ICHTHYOSAUR, ICHTHYOSAURUS. |
| ICHTHYOSAURS | • ichthyosaurs n. Plural of ichthyosaur. • ICHTHYOSAUR n. a large fossil marine reptile, also ICHTHYOSAURIAN, ICHTHYOSAURUS. |
| ICHTHYOSAURUS | • ichthyosaurus n. (Archaic) Alternative form of ichthyosaur. • ichthyosaurus n. Any members of the genus Ichthyosaurus. • Ichthyosaurus prop.n. A taxonomic genus within the family Ichthyosauridae – large, extinct marine reptiles. |
| ICHTHYOSAURUSES | • ICHTHYOSAURUS n. a large fossil marine reptile, also ICHTHYOSAUR, ICHTHYOSAURIAN. |
| ORNITHORHYNCHUS | • ornithorhynchus n. A platypus (genus Ornithorhynchus). • Ornithorhynchus prop.n. A taxonomic genus within the family Ornithorhynchidae – the single species Ornithorhynchus anatinus… • ORNITHORHYNCHUS n. the duckbill platypus. |
| SCHIZOPHYCEOUS | • schizophyceous adj. (Zoology) Of or relating to the Schizophyceae, a class of blue-green algae. • SCHIZOPHYCEOUS adj. of or belonging to the Schizophyceae, a group of bluish-green algae. |