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4 definitions found
 for foetus
From The Collaborative International Dictionary of English v.0.48 :

  foetus \foetus\, Foetus \F[oe]"tus\, n.
     Same as Fetus.
     [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Fetus \Fe"tus\ (f[=e]"t[u^]s), n.; pl. Fetuses
     (f[=e]"t[u^]s*[e^]z). [L. fetus, foetus, a bringing forth,
     brood, offspring, young ones, cf. fetus fruitful, fructified,
     that is or was filled with young; akin to E. fawn a deer,
     fecundity, felicity, feminine, female, and prob. to do, or
     according to others, to be.]
     The young or embryo of a vertebrate animal in the womb, or in
     the egg; often restricted to the later stages in the
     development of viviparous and oviparous animals. showing the
     main recognizable features of the mature animal, embryo
     being applied to the earlier stages. [Written also
     [1913 Webster]

From WordNet (r) 3.0 (2006) :

      n 1: an unborn or unhatched vertebrate in the later stages of
           development showing the main recognizable features of the
           mature animal [syn: fetus, foetus]

From Bouvier's Law Dictionary, Revised 6th Ed (1856) :

  FOETUS, med. jur. The unborn child. The name of embryo is sometimes given to 
  it; but, although the terms are occasionally used indiscriminately, the 
  latter is more frequently employed to designate the state of an unborn child 
  during the first three months after conception, and by some until 
  quickening. A foetus is sometimes described by the uncouth phrase of infant 
  in ventre sa mere. 
       2. It is sometimes of great importance, particularly in criminal law, 
  to ascertain the age of the foetus, or how far it has progressed towards 
  maturity. There are certain signs which furnish evidence on this subject, 
  the principal of which are, the size and weight, and the formation of 
  certain parts as the cartilages, bones, &c. These are not always the same, 
  much of course must depend upon the constitution and health of the mother, 
  and other circumstances which have an influence on the foetus. The average 
  length and weight of the foetus at different periods of gestation, as 
  deduced by Doctor Beck, from various observers, as found by Maygrier, is 
  here given. 
                 Beck.        Maygrier.        Beck.        Maygrier.    
                         Length.                          Weight.          
  30 days. 3 to 5 lines.   10 to 12 lines.               9 to 10 grains.
   2 Months2 inches.       4 inches.      2 ounces.      5 drachms.     
   3   do. 3 inches.      6 inches.      2 to 3 ounces. 2 ounces.     
   4   do. 5 to 6 inches.  8 inches.      4 to 6 ounces. 7 to 8 ounces. 
   5   do. 7 to 9 inches.  10 inches.     9 to 10 ounces.16 ounces.     
   6   do. 9 to 12 inches. 12 inches.     1 to 2 pounds. 2 pounds.      
   7   do. 12 to 14 inches.14 inches.     2 to 3 pounds. 3 pounds.      
   8   do. 16 inches.      16 inches.     3 to 4 pounds. 4 pounds.      
       3. The discordance apparent between them proves that the observations 
  which have been made, are only an approximation to truth. 
       4. It is proper to remark that the Paris pound poids de marc, which was 
  the weight used by Maygrier, differs from avoirdupois weight used by Dr. 
  Beck. The pound poids de marc, of sixteen ounces, contains 9216 Paris 
  grains, whilst the avoirdupois contains only 8532.5 Paris grains. The Paris 
  inch is 1.065977 English inch. Vide, generally, 1 Beck's Med. Jur. 239; 2 
  Dunglison's Human Physiology, 391; Ryan's Med. Jur. 137; 1 Chit. Med. Jur. 
  403; I Briand, Med. Leg. prem. partie, c. 4, art. 2; and the articles Birth; 
  Dead Born; Foeticide; In ventre sa mere; infanticide; Life; and Quick with 

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