Been looking at LP records today, actually at the definitions.
They weren't called vinyl until the 1980-ies, to distinguish the LP from the CD.

The analogue record was first marketed in 1895, overtaking from the engraved cylinder previously used as a recording medium. The first 20 years, rubber dominated and after which the shellac record (secret from the incect Coccus lacca, found in Thailand + cotton fibres) was the most popular substrate for making the 78 rpm disc (Swedish stenkaka, transl. "stonecake")

After the WWII, a number of formats used a vinyl substrate allowing slower speeds with better sound quality, noteworthy the 7" 45 rpm single and the 12" (30.5 cm) LP with 33,3 rpm. Other formats included:
>The 12" 45 rpm Maxi Single
>A 10" version of the LP disc
>A 10" 45 rpm EP format
>Small, 7" 33 rpm discs
>16,7 rpm format for spoken voice only
>Various other 12" and 10" picture discs & shaped discs

One source told me of the usage of vinyl records to capture video for playback using a modified turntable, yup and there is even a patent pending...

Read more on vinyl records