(a) A substance with a melting point of less than or equal to 200C at 101.3 kPa absolute pressure; or (b) a viscous substance, without a defined melting point
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}