adamantane
noun
ad·a·man·tane
ˌa-də-ˈman-ˌtān
plural -s
: a crystalline high-melting hydrocarbon C10H16 having the carbon atoms of its skeleton in the same tricyclic pattern found in the space lattice of the diamond; symmetrical tricyclo-decane
Word History
Etymology
International Scientific Vocabulary adamant entry 2 + -ane; probably originally formed as German adamantan
First Known Use
1933, in the meaning defined above