Pronunciation: [mˈɛtəsˌʌm] (IPA) 
The word "metasome" is spelled with three syllables: \ˈmɛtʌˌsoʊm\. The "me" sound is pronounced like "met," the "ta" is like "tah," and the "so" is like "soh." The last syllable, "me," has a longer "oh" sound. In terms of definition, a "metasome" is a small, motile cytoplasmic mass that exists alongside the nucleus in certain ciliate protozoans. Its function is to assist in the regulation of metabolic processes within the cell.
Metasome is a term used in biology to describe a distinct region or unit within a multicellular organism or structure that exhibits specific characteristics or functions. It is derived from the combination of the prefix "meta-" meaning "beyond" or "transcending" and "some," which refers to a body or aggregate structure.
In biological systems, metasome typically refers to a differentiated part or segment that performs a specialized function within an organism. It can be considered as a modular unit that contributes to the overall organization and functioning of a larger body or system. For example, within the context of animal anatomy, metasomes can refer to specific body segments like the thorax or abdomen, which possess distinct structures and functions.
In the field of microbiology, metasome can also refer to a group of genes or genetic elements located in close proximity in a genome that collectively regulate a particular cellular process or pathway. These metasomes often consist of functionally related genes or regions that work synergistically to carry out specific metabolic functions or respond to environmental stimuli.
Overall, the term metasome highlights the concept of organization and compartmentalization within biological structures, emphasizing the presence of distinct parts or units that contribute to the overall functioning and complexity of an organism or system.
