cavitands

https://doi.org/10.1351/goldbook.C00914
Compounds constrained by structure to having or accommodating a cavity large enough to host other molecules.
See:
inclusion compounds
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1327 [Terms] [Paper]