As a noun syn
is sight (especially denoting line of sight, the ability to see something particular).
As a proper noun lyn is
a short form of female given names ending in -lyn, such as evelyn and carolyn; also used as a formal middle name.
syn
English
Adjective
(
en adjective)
(chemistry) That has a torsion angle between 0° and 90°.
Coordinate terms
* (chemistry) anti
Anagrams
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