A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Ab Ac Ad Ae Ag Al Am An Ar As Au
Acc Ace Act

Accidental

Adjective

1. Happening unexpectedly or by chance. (biology-online.org)

2. Refers to the occurrences or existence of all those species that would not be found in a particular region under normal circumstances. (buzzle.com)

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