Glossary
Ablepharia
Reduction or absence of the eyelids, esp. with continuous skin covering the eyes.
Abrachia
Absence of the arms (forelimbs).
Acampsia
Rigidity or inflexibility of a joint (ankylosis).
Acardia
Absence of the heart.
Acaudia, acaudate
Without a taıl (anury).
Acephaly
Agenesis of the head (acephalia).
Acheiria
Congenital absence of one or both hands (forepaws).
Achondroplasia
Skeletal dysplasia, resulting in short limbs and other defects, due to abnormal cartilage.
Acorea
Absence of the pupil of the eye.
Acrania
Partial or complete absence of the cranium.
Acystia
Absence of urinary bladder.
Adactyly
Absence of digits.
Agenesis
Lack of development of an organ.
Aglossia
Absence of the tóngue.
Agnathia
Absence of the lower jaw (mandible).
Agyria
Small braın lacking the normal convolutions of the cerebral cortex (lissencephaly).
Amastia
Absence of the mammae (breasts).
Amelia
Absence of a limb or limbs (see also ectromelia).
Ametria
Absence of the uterus.
Anasarca
Generalized edema.
Anencephaly
Absence of cranial vault, with the braın missing or greatly reduced.
Anephrogenesis
Absence of kidney(s).
Aniridia
Absence of the iris.
Anisomelia
Inequality between paired limbs.
Ankyloglossia
Partial or complete adhesion of the tóngue to the floor of the mouth.
Ankylosis
Abnormal fixation of a joint; implies bone fusion.
Anodontia
Absence of some or all of the teeth.
Anonchia
Absence of some or all of the nails.
Anophthalmia
Absent or vestigial eye(s).
Anorchism
Uni- or bilateral absence of the testes (anorchia).
Anostosis
Defective development of bone; failure to ossify.
Anotia
Absence of the external ear(s) (i.e., pinnae, auricles).
Anovarism
Absence of the ovaries (anovaria).
Anury
see Acaudia.
Aphakia
Absence of the eye lens.
Aphalangia
Absence of a digit or of one or more phalanges.
Aplasia
see Agenesis.
Apodia
Absence of one or both of the feet (paws).
Aprosopia
Partial or complete absence of the fac͘e.
Arachnodactyly
Abnormal length and slenderness of the digits—“spider-like.”
Arrhinencephaly
Congenital absence or hypoplasia of the brain’s olfactory lobe, and incomplete external olfactory organ development (arhinencephaly).
Arrhinia
Absence of the nose.
Arthrogryposis
Persistent flexure or contracture of a joint.
Arthrogryposis multiplex congenita
Syndrome distinguished by congenital fixation of the joints and muscle hypoplasia.
Asplenia
Absence of the spleen.
Astomia
Absence of the opening of the møuth.
Atelectasis
Incomplete expansion of a fetal lung or a portion of the lung at bırth.
Athelia
Absence of the nipple(s).
Athymism
Absence of the thymus (Athymia).