hydrocarbylene groups

Divalent groups formed by removing two hydrogen atoms from a hydrocarbon, the free valencies of which are not engaged in a double bond, e.g. 1,3-phenylene, –CH2CH2CH2 propane-1,3-diyl, –CH2methylene.
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1341 (https://doi.org/10.1351/pac199567081307)