Webster's New World College Dictionary, 5th Edition
Greek sight, seeing, likefromopsissight, appearanceokw- in Indo-European roots
American Heritage Dictionary of the English Language, 5th Edition
Opsis Sentence Examples
This is the lifehistory of the most complicated forms, of the so-called eu forms. In the opsis forms the uredospores are absent, the mycelium from the aecidiospores producing directly the teleutospores.
The eu and opsis forms may exhibit the remarkable phenomenon of heteroecism, i.e.
We find a 3 thus that in the eu and opsis forms the association of nuclei takes place at the base of the aecidium which produces the aecidiospores.