Here are some options you can use:
* "Parsnip" - You can simply use the English word "parsnip" as it is understood by many Filipinos.
* "Pastinaca sativa" - You can use the scientific name of the vegetable.
* "Uri ng gulay na parang karot pero may kakaibang lasa" - This means "a type of vegetable that looks like a carrot but has a different taste."
Ultimately, the best way to refer to parsnip in Tagalog depends on the context and your audience.