sight unseen
(organic chemistry) A heterocycle 1,4-diazacycloheptane formally derived from a piperazine by introduction of a methylene group in the ring
(idiomatic) Not having seen the object beforehand.
A Gram-negative bacterium, of the genus Yersinia, that is an etiological agent of several diseases in animals and humans, notably Yersinia pestis, which causes bubonic plague.
Any oomycete of the phylum Peronosporomycetes
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