teratology noun. [tɛrǝ'tɒlǝdʒi] L17.
[from TERATO- + -LOGY.]
1. A marvellous or incredible tale; a collection of such tales. Also, mythology relating to fantastic creatures, monsters, etc. L17.

2. The branch of medicine and of developmental biology which deals with congenital defects and abnormal formations. M19.

■ terato'logical adjective of or pertaining to teratology M19.

■ teratologist noun a specialist in teratology M19.

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