Table of Contents
1. surface-active_agent
noun. a chemical agent capable of reducing the surface tension of a liquid in which it is dissolved.
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2. vertical
adjective. ['ˈvɝːtɪkəl'] at right angles to the plane of the horizon or a base line.
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Synonyms
3. vertical
adjective. ['ˈvɝːtɪkəl'] of or relating to different levels in a hierarchy (as levels of social class or income group).
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4. surface
noun. ['ˈsɝːfəs'] the outer boundary of an artifact or a material layer constituting or resembling such a boundary.
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5. surface
noun. ['ˈsɝːfəs'] the extended two-dimensional outer boundary of a three-dimensional object.
7. surface
noun. ['ˈsɝːfəs'] a superficial aspect as opposed to the real nature of something.