different between mandible vs agnathia

English

Alternative forms

• mandibula

Etymology

Late Middle English, borrowed from Late Latin mandibula (“jaw”), from mand? (“chew, masticate”) +? -bula (instrument noun suffix).

Pronunciation

• IPA^(key): /?mæn.d?b.?l/, /?mæn.d?b.l?/
• Rhymes: -ænd?b?l

Noun

mandible (plural mandibles)

1. (anatomy, zootomy)
   1. The jaw or a jawbone, especially the lower jawbone in mammals and fishes.

      Synonyms: dentary, dentary bone, inferior maxillary bone, jawbone, lower jaw, submaxilla

   2. Either of the upper and lower segments of a bird's beak.
   3. Any of various invertebrate mouthparts serving to hold or bite food materials.
      1. One of the anterior pair of mouthparts of an arthropod, designed for holding and cutting food.

Derived terms

Related terms

• mange
• manger

Translations

See also

• jowl

References

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

English

Etymology

Ancient Greek ?- (a-, “without”) + ?????? (gnáthos, “jaw”) +? -ia.

Pronunciation

• enPR: ?g-n??thi-?, IPA^(key): /æ??ne?.?i.?/

Noun

agnathia (uncountable)

1. (pathology) A birth defect in which the mandible is missing.
   • 1831, William West, translation of Gabriel Andral, A Treatise on Pathological Anatomy, Hodges and Smith, volume 2, page 283:

     When there is agnathia, instead of the inferior maxillary bone we find nothing but a kind of tubercle formed of skin, cellular tissue, fat, and some few muscular fibres.

   • 1907, Francis Delafield and T. Mitchell Prudden, A Text-Book of Pathology, eighth edition, William Wood, page 304

     The lower jaw may be absent (agnathia).

   • 2006, Mark I. Evans et al., Prenatal Diagnosis, McGraw-Hill, ?ISBN, page 240:

     As such, it is often accompanied by agnathia, a congenital absence of the mandible[…].

Related terms

• agnath
• agnatha
• agnathan
• agnathous

Translations

References

• agnathia in The Century Dictionary, New York, N.Y.: The Century Co., 1911.