"Milk fruit" is a term that can refer to several different plant species, each with its own unique characteristics. Here are a few examples of plants commonly known as "milk fruit":

1. Ackee (Blighia sapida): The ackee fruit is native to West Africa but is also cultivated in tropical regions. It is the national fruit of Jamaica. The ripe, yellow fruit is edible, but the unripe fruit and seeds contain toxic compounds and must be prepared carefully before consumption.

2. Balata (Manilkara bidentata): Also known as bulletwood, balata is a tropical tree native to the Caribbean and Central America. Its fruit is often referred to as milk fruit, and when cut open, it exudes a milky sap. The fruit is not typically eaten.

3. Star apple (Chrysophyllum cainito): Star apple is a tropical tree native to the Caribbean and Central America. It produces round or oval fruits with a smooth, purple or green skin. When cut open, the fruit has a milky, sweet juice surrounding the seeds. The flesh is usually eaten, while the skin and seeds are discarded.

It's worth noting that these are just a few examples, and there may be other plant species referred to as "milk fruit" in different regions. If you have a specific plant in mind or would like more information about a particular milk fruit, please provide additional details, and I'll be happy to help further.