raphe
Noun
Meaning
A line, ridge, furrow, or band of fibers, especially in the median line; as, the raphe of the tongue.
Same as Rhaphe.
Source: Webster's dictionarySynonyms
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Certain araphid species, that is pennate diatoms without a raphe, have been documented as anisogamous and are, therefore, considered to represent a transitional stage between centric and raphid pennate diatoms, diatoms with a raphe.
Other seed appendages include the raphe (a ridge), wings, caruncles (a soft spongy outgrowth from the outer integument in the vicinity of the micropyle), spines, or tubercles.
Periaqueductal grey (with hypothalamic hormone aid) hormonally signals reticular formation’s raphe nuclei to produce serotonin that inhibits laminae pain nuclei.