The term “scimitar”, when used in blazon, denotes a highly stylized sword with a crescent blade; it is an exaggerated depiction of actual swords from the Middle East, e.g., the shamshir. In its heraldic form, the scimitar is found in the arms of Chanpollo, c.1550 [BSB 272:195], and the arms of Hodgson, c.1520 [DBA4 436]; the latter were on occasion misblazoned in period as using falchions.
The term “saber” is recognized as a synonym for the scimitar [Parker 509]. It was once used in Society blazonry to denote a modern cavalry saber; this form of sword is no longer registerable.
Robert Blade bears: Argent, a scimitar gules and a scimitar sable crossed in saltire.
Schaibar of Lorien bears: Per fess Or and gules, a scimitar inverted bendwise sinister counterchanged.
Keradwc an Cai bears as a badge: Sable, three scimitars in annulo argent.