incense

Definition:

The term "incense" refers to a mixture of fragrant spices that is burned to produce smoke that has a pleasant smell.

God told the Israelites to burn incense as an offering to him.
The incense had to be made by mixing equal amounts of five specific spices exactly as God directed. This was a sacred incense, so they were not allowed to use it for any other purpose.
The "altar of incense" was a special altar that was only used for burning incense.
The incense was offered at least four times a day, at each hour of prayer. It was also offered every time a burnt offering was made.
The burning of incense represents prayer and worship rising up to God from his people.
Other ways to translate "incense" could include "fragrant spices" or "good-smelling plants."