prefix
poly-
Prefix used in borrowed scientific, technical, and product terms to mean 'many' or 'poly-,' as in polymer names and materials.
この部品はポリカーボネート製です。
This part is made of polycarbonate.
noun
polyethylene
Abbreviation of ポリエチレン, usually seen inside compounds such as ポリ袋; in everyday speech it may be understood broadly as a plastic/polyethylene item.
See also: ポリエチレン
スーパーでポリ袋を一枚もらった。
I got a plastic bag at the supermarket.
noun
polyphony; number of simultaneous voices
Music and electronic-instrument jargon, clipped from ポリフォニー; used especially in specifications for keyboards and synthesizers.
See also: ポリフォニー
このシンセの同時発音数は最大64ポリです。
This synthesizer has a maximum polyphony of 64 voices.