1) An organic isocyanide 
==Is `was a former` redundant?== There is a series of articles on past and present Canadian electoral districts. Where a district no longer exists because of redistribution, which is correct: I believe that the past nature of the district is captured in `former`, and that adding the past tense to the sentence is either redundant, or `undoes`...
An organic isocyanide. ... (05 Mar 2000) ... 
Type: Term Pronunciation: ī′sō-nī′tril Definitions: 1. An organic isocyanide.