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COISTRILS is validvalid
COISTRIL, coistrel [n]
COISTRIL, (obsolete) an inferior groom or lad employed by an esquire to carry the knight's arms and other necessaries, also COISTREL, COYSTREL, COYSTRIL, CUSTREL [n]
COISTRIL, coistrel [n]
COISTRIL, (obsolete) an inferior groom or lad employed by an esquire to carry the knight's arms and other necessaries, also COISTREL, COYSTREL, COYSTRIL, CUSTREL [n]