diisobutylene
noun
di·isobutylene
(¦)dī+
: a liquid mixture containing the two octylenes 2,4,4-trimethyl-1-pentene and 2,4,4-trimethyl-2-pentene obtained from isobutylene by reaction with acid catalysts and used as an intermediate (as for plastics)
Word History
Etymology
di- + isobutylene