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This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...
v. t. e. A drawing of a cat by T. W. Wood in Charles Darwin 's book The Expression of the Emotions in Man and Animals, described as acting "in an affectionate frame of mind". Emotion is defined as any mental experience with high intensity and high hedonic content. [1] The existence and nature of emotions in non-human animals are believed to be ...
Emotions. v. t. e. The study of the evolution of emotions dates back to the 19th century. Evolution and natural selection has been applied to the study of human communication, mainly by Charles Darwin in his 1872 work, The Expression of the Emotions in Man and Animals. [1] Darwin researched the expression of emotions in an effort to support his ...
Emotion classification, the means by which one may distinguish or contrast one emotion from another, is a contested issue in emotion research and in affective science. Researchers have approached the classification of emotions from one of two fundamental viewpoints: [citation needed]
Courage (also called bravery, valour (British and Commonwealth English), or valor (American English)) is the choice and willingness to confront agony, pain, danger, uncertainty, or intimidation. Valor is courage or bravery, especially in battle. Physical courage is bravery in the face of physical pain, hardship, even death, or threat of death ...
Emotions are physical and mental states brought on by neurophysiological changes, variously associated with thoughts, feelings, behavioral responses, and a degree of pleasure or displeasure. [1][2][3][4] There is no scientific consensus on a definition. [5][6] Emotions are often intertwined with mood, temperament, personality, disposition, or ...
Valence, also known as hedonic tone, is a characteristic of emotions that determines their emotional affect (intrinsic appeal or repulsion). Positive valence corresponds to the "goodness" or attractiveness of an object, event, or situation, making it appealing or desirable. Conversely, negative valence relates to "badness" or averseness ...
Emotionality is the observable behavioral and physiological component of emotion. It is a measure of a person's emotional reactivity to a stimulus. [2] Most of these responses can be observed by other people, while some emotional responses can only be observed by the person experiencing them. [3]