Definitions of congenital on the Web:

• present at birth but not necessarily hereditary; acquired during fetal development
  wordnetweb.princeton.edu/perl/webwn

• Congenital disorder involves defects in or damage to a developing fetus. It may be the result of genetic abnormalities, the intrauterine (uterus ...
  en.wikipedia.org/wiki/Congenital

• Present since birth
  en.wiktionary.org/wiki/congenital

• congenitally - In a congenital manner
  en.wiktionary.org/wiki/congenitally

• Present at birth; may have genetic or environmental causes.
  www.apluspetgoods.com/petsupplies/cat-glossary.php

• present at birth
  www.preventblindness.org/uveitis/glossary.html

• Present at the time of birth.
  schools.look4.net.nz/science/biology/human/glossary2/

• A characteristic of an animal that is present at birth. It may be inherited or induced by events that occur during pregnancy.
  www.peteducation.com/dict_alpha_listing.cfm

• Existing at birth.
  www.dbs-stn.org/glossary.php

• Any condition acquired during development in the uterus and not through heredity.
  www.nasdha.net/LearningCenter/glossary.htm

• A condition that exists at birth - generally inherited
  chamownersweb.net/function_pages/illustrated_glossary.htm

• Occurring before, at, or shortly after birth
  www.nsu.govt.nz/Health-Professionals/2419.asp

• Describes a disease or condition with which someone is born.
  www.organtransplants.org/glossary.html

• A condition which is present at birth, although it can be recognised prenatally, at birth or many years later. A Congenital disorder can be genetic or acquired at any time during fetal development.
  www.cafamily.org.uk/medicalinformation/conditions/dictionaryandglossary.html

• inherited genetically, therefore present, or potentially present, from birth.
  www.qimr.edu.au/qimr_glossary.html