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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 ...
The first English use of the expression "meaning of life" appears in Thomas Carlyle's Sartor Resartus (1833–1834), book II chapter IX, "The Everlasting Yea". [1]Our Life is compassed round with Necessity; yet is the meaning of Life itself no other than Freedom, than Voluntary Force: thus have we a warfare; in the beginning, especially, a hard-fought battle.
The definition of life has long been a challenge for scientists and philosophers. [ 2 ] [ 3 ] [ 4 ] This is partially because life is a process, not a substance. [ 5 ] [ 6 ] [ 7 ] This is complicated by a lack of knowledge of the characteristics of living entities, if any, that may have developed outside Earth.
A person's livelihood (derived from life-lode, "way of life"; cf. OG lib-leit) [1] refers to their "means of securing the basic necessities (food, water, shelter and clothing) of life". Livelihood is defined as a set of activities essential to everyday life that are conducted over one's life span.
However, not every definition of life considers all of these properties to be essential. Human-made analogs of life may also be considered to be life. The biosphere is the part of Earth's outer shell—including land, surface rocks, water, air and the atmosphere—within which life occurs, and which biotic processes in turn alter or transform.
It is not universally accepted that there is a clear boundary between metaphysics and ontology. Some philosophers use both terms as synonyms. [11] The etymology of the word ontology traces back to the ancient Greek terms ὄντως (ontos, meaning ' being ') and λογία (logia, meaning ' study of '), literally, ' the study of being '.
Scientists have debated the definition of life for decades, but they still lack a consensus on the answer. Skip to main content. Lifestyle. 24/7 help. For premium support please call: ...
The meaning of spirituality has developed and expanded over time, and various meanings can be found alongside each other. [1] [2] [3] [note 1] Traditionally, spirituality is referred to a religious process of re-formation which "aims to recover the original shape of man", [note 2] oriented at "the image of God" [4] [5] as exemplified by the founders and sacred texts of the religions of the world.