IPA: /ˌtɛrəˈtɒlədʒɪkəl/
KK: /tɛrəˈtɑlədʒɪkəl/
Relating to the study of abnormal growth or development, especially in embryos or fetuses.
The teratological effects of certain drugs can lead to serious birth defects.
Teratological → It is formed from "terato-" (from Greek "teratos", meaning monster or abnormality) and "-logical" (from Greek "logia", meaning study or discourse). The word refers to the study of abnormalities or monsters, particularly in biological contexts.
Think of 'terato-' meaning 'monster' and '-logical' meaning 'study' — this helps you remember that teratological relates to the study of abnormalities.