trilobite
Longman Dictionary of Contemporary English 5++LDOCE 5++tri·lo·bite /ˈtraɪləbaɪt/ noun [countable] 
HBIa type of fossil of a small sea creature 三叶虫
HBIa type of fossil of a small sea creature 三叶虫Examples from the Corpus
trilobite• For example, you never find horse fossils among trilobite remains.• There are a number of Paradoxides species, which include some of the largest trilobites.• This is one of the most primitive trilobites known.• The differences among the trilobites of different ages can be used by paleontologists to date these rocks.• As the trilobites spread through the seas of the world, they diversified into a great number of species.• The external shell gives the crustaceans the problem it gave the trilobites.• The trilobites produced the mosaic eye which has been retained by the insects.• Trinucleid trilobites are blind, and with a greatly inflated mid-part of the head region.Origin trilobite (1800-1900) Modern Latin Greek trilobos, from tri- “three” + lobos ( → LOBE)tri·lo·bite nounChineseSyllable
small of a Corpus a type sea fossil of
