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a-, an-: Pronunciation: /ə/, /a/, /ən/, /an/. Origin: Ancient Greek: ἀ-, ἀν-(a, an-). Meaning: a prefix used to make words with a sense opposite to that of the root word; in this case, meaning "without" or "-less". This is usually used to describe organisms without a certain characteristic, as well as organisms in which that ...
The binomial name often reflects limited knowledge or hearsay about a species at the time it was named. For instance Pan troglodytes, the chimpanzee, and Troglodytes troglodytes, the wren, are not necessarily cave-dwellers. Sometimes a genus name or specific descriptor is simply the Latin or Greek name for the animal (e.g. Canis is Latin for ...
It is also sometimes called a stricture (as in urethral stricture). [ 3 ] Stricture as a term is usually used when narrowing is caused by contraction of smooth muscle (e.g. achalasia , prinzmetal angina ); stenosis is usually used when narrowing is caused by lesion that reduces the space of lumen (e.g. atherosclerosis ). [ 4 ]
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 ...
Stricture may refer to: stricture (medicine), a narrowing of a tubular structure, in medicine esophageal stricture, in medicine; a feature of the Perl programming ...
When a non-English name has a set English pronunciation (or pronunciations), include both the English and non-English pronunciations; the English transcription must always be first. If the native name is different from the English name, the native transcription must appear after the native name. For example:
homonym: names spelled identically, but, in some codes, names spelled similarly, as defined by the code senior homonym (zoology): the first legitimate use of the name which generally takes priority; junior homonym (zoology), later homonym (botany): a later and generally illegitimate use, though in some circumstances the later name is allowed to ...
In order to open the stricture, a surgeon can insert a bougie – a weighted tube used to dilate the constricted areas in the esophagus. [3] It can sometimes be treated with other medications. For example, an H2 antagonist (e.g. ranitidine ) or a proton-pump inhibitor (e.g. omeprazole ) can treat underlying acid reflux disease.