1. A branch of knowledge
   - discipline, subject, subject area, subject field, field, study, bailiwick

Derived forms: fields of study

Type of: domain, knowledge base, knowledge domain

Encyclopedia: Field of study

• genus Acanthocybium
• genus Acanthophis
• genus Acanthoscelides
• genus Acanthurus
• genus Acanthus
• genus Acarus
• genus Accipiter
• genus Acer
• genus Acherontia
• genus Acheta
• genus Achillea
• genus Achimenes
• genus Achoerodus
• genus Achras
• genus Acinonyx
• genus Acinos
• genus Acipenser
• genus Acocanthera
• genus Acokanthera
• genus Aconitum
• genus Acorus
• genus Acridotheres
• genus Acris
• genus Acrobates
• genus Acrocarpus