noun
polyethylene terephthalate; PET (plastic)
Refers to the plastic material, commonly used for bottles and containers.
このボトルはPET素材でできています。
This bottle is made of PET material.
noun
positron emission tomography; PET (scan)
Medical imaging technique; often used in compounds like PET検査.
医者はPET検査の結果を説明した。
The doctor explained the results of the PET scan.