The word "Citigradae" is spelled "sɪtɪ'ɡreɪdi". The first syllable "sɪtɪ" is pronounced like "city", while the second syllable "ɡreɪdi" sounds like "grade" with the addition of the "ee" sound. The word Citigradae refers to a hypothetical family of birds that are thought to have lived in rainforests during the Eocene period. The spelling of the word is derived from its Latin roots and reflects the scientific naming conventions used in taxonomy.