steric hindrance

https://doi.org/10.1351/goldbook.S06000
The original term for a steric effect arising from crowding of substituents.
Source:
PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1168 (https://doi.org/10.1351/pac199466051077)