1. Significant; ominous; serving as a warning of danger; - applied esp. to the warning colours or forms of certain animals

Encyclopedia: Sematic

• ordainment
• ordeal
• ordeal bean
• ordeal tree
• order
• order Acarina
• order Accipitriformes
• order Actinaria
• order Actiniaria
• order Actinomycetales
• order Actinomyxidia
• order Aepyorniformes
• order Agaricales
• order Alcyonaria
• order Alismales
• order Amoebida
• order Amoebina
• order Amphipoda
• order Anacanthini
• order Anaspida
• order Andreaeales
• order Anguilliformes
• order Anoplura
• order Anostraca
• order Anseriformes