In English grammar, an abstract noun is a noun or noun phrase that names an idea, event, quality, or conceptâfor example, courage, freedom, progress, love, patience, excellence, and friendship. An abstract noun names something that can't be physically touched. Contrast with concrete noun.
The adult human brain weighs on average about 1.2â1.4 kg (2.6â3.1 lb), or about 2% of total body weight, with a volume of around 1260 cm3 in men and 1130 cm3 in women, although there is substantial individual variation.
The adult human brain weighs on average about 1.5 kg (3.3 lb) with a volume of around 1130 cubic centimetres cm 3 in women and 1260 cm 3 in men, although there is substantial individual variation.here is, however, substantial variation; a study of 46 adults aged 22â49 years and of mainly European descent found an average brain volume of 1273.6 cm 3 for men, ranging from 1052.9 to 1498.5 cm 3, and 1131.1 cm 3 for women, ranging from 974.9 to 1398.1 cm 3.