Homo ergaster may have been the first human species to leave Africa and fossil remains show this species had expanded its range into southern Eurasia by 1.75 million years ago. Their descendents, Homo erectus, then spread eastward and were established in South East Asia by at least 1.6 million years ago. However, an alternate theory proposes that hominins migrated out of Africa before Homo ergaster evolved, possibly about 2 million years ago, prior to the earliest dates of Homo erectus in Asia.
Wiktionary (0.00 / 0 votes) Rate this definition: fume (Noun). A gas or vapour/vapor that smells strongly or is dangerous to inhale. Fumes are solid particles formed by condensation from the gaseous state, e.g. metal oxides from volatilized metals.They can flocculate and coalesce.Their particle size is between 0.1 and 1 micron. gas or vapour/vapor that smells strongly or is dangerous to inhale. Fumes are solid particles formed by condensation from the gaseous state, e.g. metal oxides from volatilized metals. They can flocculate and coalesce. Their particle size is between 0.1 and 1 micron.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  fume(Noun) A gas or vapour/vapor that smells strongly or is dangerous to inhale. 2  fume(Noun) A material that has been vaporized from the solid state to the gas state and re-coalesced to the solid state. 3  fume(Verb) Emit fumes.