Elastane is the same as Spandex. Both are yarns that are knit/woven into fabrics, and contribute stretch and recovery properties to the fabric. Spandex is DuPontâs brand, elastane is the generic name.
In Latin 'Libra' are the symbol for the scales, hence the use of lb for weight (and lbs for the multiple),
The abbreviation lb comes from the Latin word libra, meaning scales or balances. Generally speaking, it is incorrect to use the plural form lbs to mean pounds, as thâ¦e Latin plural of libra is also libra - therefore you would still use the abbreviation lb for more than one pound.