Mammals (class Mammalia /mÉËmeÉªli.É/ from Latin mamma breast) are a clade of endothermic amniotes distinguished from reptiles and birds by the possession of a neocortex (a region of the brain), hair, three middle ear bones and mammary glands.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  burgeoning(Noun) the act of budding or sprouting. 2  burgeoning(Noun) a bud or branch. 3  burgeoning(Noun) a new growth or expansion of something.  burgeoning(Adjective) that buds, grows or expands; developing.
outgrowth, growth. 1  beginning - the event consisting of the start of something; the beginning of the war. 2  rise - a growth in strength or number or importance. 3  beginning - the event consisting of the start of something; the beginning of the war. 4  eruption - the emergence of a tooth as it breaks through the gum.