The term “vegetable oil” refers only to plant oils that are liquid at room temperature.
It can also be defined without regard to a substance’s state of matter at a given temperature.
For this reason, vegetable oils that are solid at room temperature are sometimes called vegetable fats.
Although many plant parts may yield oil, in commercial practice, oil is extracted primarily from seeds.
On food packaging, the term “vegetable oil” is often used in ingredients lists instead of specifying the exact plant being used, especially when the oil used is less desirable to the consumer or if a mix is used. (source)
So can hamsters eat vegetable oil?
No they can’t at all. It will make them sick.