(chemistry) Any compound having two or more rings interconnected like the links of a chain, without a covalent bond.

(chemistry) a substance consisting of molecules of one element or compound contained within the cage-like structure of another

(organic chemistry) Any compound which exhibits aromaticity.

(chemistry) any compound of general formula R₂C=N⁺=N⁻

(organic chemistry) Any compound containing carbon atoms covalently bound to other atoms.

(chemistry) any of a class of compounds having five-membered ring heterocycles (or their benzo derivatives) which possess a sextet of π-electrons in association with the atoms comprising the ring, but which cannot be represented by any one covalent or polar structure; typically the ring structure contains both positive and negative delocalised charges which cannot be associated with any one ring atom, and the negative charge can also be associated with a conjugated exocyclic atom (typically oxygen, sulfur, or nitrogen).

(organic chemistry) Any cyclophane in which the para positions of a benzene ring are connected by a bridge of at least 10 atoms.

(chemistry) a compound whose molecule undergoes rapid intramolecular rearrangements among equivalent structures in which the component atoms are interchanged

(banking, finance) Interest, as on a loan or a bank account, that is calculated on the total on the principal plus accumulated unpaid interest.

(chemistry) a crystalline solid consisting of a host lattice containing voids into which guest atoms or molecules are inserted