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| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| the offspring of a zebra and a donkey. |
| -one | |
| —suffix forming nouns | |
| indicating that a chemical compound is a ketone: acetone | |
| [arbitrarily from Greek -ōnē, feminine patronymic suffix, but perhaps influenced by -one in | |
-one suff.
A ketone: acetone.
A compound that contains oxygen, especially in a carbonyl radical: lactone.
| -one
A suffix used to form the names of chemical compounds containing an oxygen atom attached to a carbon atom, such as acetone. |