1. In the Christian era; used before dates after the supposed year Christ was born
   - AD, A.D., year of our Lord

Encyclopedia: Anno Domini

• hydropower
• hydrops
• hydroquinone
• hydrosphere
• hydrostatic
• hydrostatic head
• hydrostatical
• hydrostatics
• hydrotherapy
• hydrothermal
• hydrothorax
• hydrotropic
• hydrotropism
• hydrous
• hydroxide
• hydroxide ion
• hydroxy
• hydroxy acid
• hydroxyacetic acid
• hydroxybenzene
• hydroxybenzoic acid
• hydroxybutyric acid
• hydroxychloroquine
• hydroxyl
• hydroxyl group