egg-tooth

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • egg tooth — n. a tooth like structure on the nose or beak of young reptiles and birds used to break the egg membrane or shell at the time of hatching …   English World dictionary

  • egg tooth — egg′ tooth n. zool. a calcareous prominence at the tip of the beak or upper jaw of an embryonic bird or reptile, used to break through the eggshell at hatching • Etymology: 1890–95 …   From formal English to slang

  • Egg tooth — In some egg laying animals, the egg tooth is a small, sharp, cranial protuberance used by offspring to break or tear through the egg s surface during hatching. It is present in most birds and reptiles, and similar structures exist in monotremes,… …   Wikipedia

  • egg tooth — a calcareous prominence at the tip of the beak or upper jaw of an embryonic bird or reptile, used to break through the eggshell at hatching. [1890 95] * * * ▪ anatomy       tooth or toothlike structure used by the young of many egg laying species …   Universalium

  • egg tooth — noun : a hard sharp prominence on the tip of the beak or nose of embryo birds and oviparous reptiles with which they break through the eggshell; also : an analogous chitinous prominence on the head of an insect * * * a calcareous prominence at… …   Useful english dictionary

  • egg tooth — noun Date: 1893 a hard sharp prominence on the beak of an unhatched bird or the nose of an unhatched reptile that is used to break through the eggshell …   New Collegiate Dictionary

  • egg tooth — noun A small, sharp, cranial protuberance used by offspring to break or tear through the eggs surface during hatching …   Wiktionary

  • egg tooth — noun a hard white protuberance on the beak or jaw of an embryo bird or reptile, used for breaking out of the shell …   English new terms dictionary

  • egg tooth — /ˈɛg tuθ/ (say eg toohth) noun a calcareous point on the tip of the beak or upper jaw, by which an unhatched bird or reptile breaks through the eggshell on hatching …   Australian English dictionary

  • Egg (biology) — Bird eggs and others (click on image for key) …   Wikipedia

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