Definition of "fiberglas"

Made of fiberglas, the 100 to 150 pound saucers are guided simply by shifting body weight in the desired direction; they seem to slide downhill on air.

1963, Popular Mechanics, volume 119, number 6, page 97

A rather unusual application of fiberglas. This huge structure was built by Mahaffey Greenhouse, Apopka, Florida, for foliage.

1963, Grower Talks, volume 27, page 2

The fiberglas we used was a roll of 50 ' X 4 ' "clear" fiberglas, which actually is sort of frosty and diffuses the light, so I only have to shade in spring and fall.

1980, American Orchid Society Bulletin, volume 49, number 10, page 1110