ˈ ̷ ̷ˌ ̷ ̷ noun
( -s )
1. : any of several diseases of animals: as
a. : equine osteoporosis
b. : an acute photosensitization of sheep and goats that follows the ingestion of certain plants and is characterized by subcutaneous edema of the head, ears, and neck, by impairment of vision, and by fever
c. Australia : a malignant edema of rams due to infection of head wounds with a bacterium ( Clostridium novyi ) causing gelatinous infiltration of the head and neck usually followed by death
2. : an exaggerated opinion of one's worth or importance : conceit , pomposity
• big·head·ed ˈ ̷ ̷| ̷ ̷ ̷ ̷ adjective