different between sulcus vs gyrus

English

Etymology

Borrowed from Latin sulcus (“a furrow made by a plow”). Doublet of sullow ("plough").

Pronunciation

• IPA^(key): /?s?l.k?s/
• Rhymes: -?lk?s

Noun

sulcus (plural sulci)

1. (anatomy) A furrow or groove in an organ or a tissue, especially that marking the convolutions of the surface of the brain.

   Synonym: fissure

   Coordinate term: gyrus

   Hyponyms: calcaneal sulcus, central sulcus, cingulate sulcus, coronal sulcus, cruciate sulcus, interlabial sulcus, intermammary sulcus, lacrimal sulcus, lateral sulcus, malleolar sulcus, postcentral sulcus, preauricular sulcus, precentral sulcus, radial sulcus, sagittal sulcus, sigmoid sulcus, sulcus ansatus, sulcus arteriae vertebralis, sulcus tubae auditivae, tympanic sulcus

2. (planetology) A region of subparallel grooves or ditches formed by a geological process.

Derived terms

• pseudosulcus
• sulcal
• sulcate

Translations

References

• “sulcus”, in Lexico, Dictionary.com; Oxford University Press, 2019–present.
• “sulcus”, in Merriam–Webster Online Dictionary, (Please provide a date or year).

Latin

Etymology

From Proto-Italic *solkos, from Proto-Indo-European *solk-o-s (“furrow”), *selk- (“to pull, drag”), whence also Old English sulh. Doublet of holcus.

Pronunciation

• (Classical) IPA^(key): /?sul.kus/, [?s????k?s?]
• (Ecclesiastical) IPA^(key): /?sul.kus/, [?sulkus]

Noun

sulcus m (genitive sulc?); second declension

1. (agriculture) A furrow made by a plow.

   Synonyms: l?ra, porca

2. (transferred sense):
   1. (agriculture) Ploughing.
   2. (of things resembling a furrow):
      1. A long, narrow trench; a ditch.
      2. (in general) A rut or track.

Inflection

Second-declension noun.

Descendants

References

• sulcus in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• sulcus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• sulcus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
• sulcus in Gaffiot, Félix (1934) Dictionnaire illustré Latin-Français, Hachette
• De Vaan, Michiel (2008) Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7)?^[4], Leiden, Boston: Brill, ?ISBN

English

Etymology

From Latin g?rus (“circle”), from Ancient Greek ????? (gûros). Doublet of gyro and gyre.

Pronunciation

• IPA^(key): /?d?a???s/

Noun

gyrus (plural gyri or gyruses)

1. (anatomy) A fold or ridge on the cerebral cortex of the brain.

   Synonym: (archaic) gyre

Derived terms

Translations

See also

• sulcus

Anagrams

• surgy

Latin

Etymology

From Ancient Greek ????? (gûros)

Pronunciation

• (Classical) IPA^(key): /??y?.rus/, [??y???s?]
• (Ecclesiastical) IPA^(key): /?d??i.rus/, [?d??i??us]

Noun

g?rus m (genitive g?r?); second declension

1. circle
2. a circular motion
3. a circuit, course, ring
4. (by extension) place where horses are trained

Declension

Second-declension noun.

Derived terms

• g?r?

Related terms

• g?r?tus

Descendants

References

• gyrus in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• gyrus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• gyrus in Gaffiot, Félix (1934) Dictionnaire illustré Latin-Français, Hachette