“+ noun
Etymology: International Scientific Vocabulary penta- + methylene
1. : cyclopentane
2. : the bivalent radical −CH 2 CH 2 CH 2 CH 2 CH 2 − derived from normal pentane by removal of one hydrogen atom from each end carbon atom
“+ noun
Etymology: International Scientific Vocabulary penta- + methylene
1. : cyclopentane
2. : the bivalent radical −CH 2 CH 2 CH 2 CH 2 CH 2 − derived from normal pentane by removal of one hydrogen atom from each end carbon atom
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012