1. Of the colour of black ink
   - ink-black, inky

See also: achromatic, neutral

• atrial fibrillation
• atrial septal defect
• Atrichornis
• Atrichornithidae
• atrioventricular
• atrioventricular block
• atrioventricular bundle
• atrioventricular nodal rhythm
• atrioventricular node
• atrioventricular trunk
• atrioventricular valve
• atrip
• Atriplex
• Atriplex hortensis
• Atriplex hymenelytra
• Atriplex lentiformis
• Atriplex mexicana
• atrium
• atrium cordis
• atrium dextrum
• atrium of the heart
• atrium sinistrum
• atrocious
• atrociously
• atrociousness