mordant – מילון אנגלי-אנגלי
mordant
n.
coloring agent; acid, corrosive liquid used in etching; adhesive agent
adj.
sharp, biting, sarcastic; pungent; incisive, shrewd; corrosive
Mordant
A
mordant is a substance used to set
dyes on fabrics or tissue sections by forming a
coordination complex with the dye which then attaches to the fabric or tissue. It may be used for dyeing fabrics, or for intensifying
stains in cell or tissue preparations. The term mordant comes from the present participle of French
mordre, "to bite". In the past, it was thought that a mordant helped the dye bite onto the fiber so that it would hold fast during washing. A mordant is often a
polyvalent metal ion. The resulting coordination complex of dye and ion is
colloidal and can be either
acidic or
alkaline.
mordant
Noun
1. a substance used to treat leather or other materials before dyeing; aids in dyeing process
(hypernym) coloring material, colouring material, color, colour
(hyponym) chrome alum
Adjective
1. harshly ironic or sinister; "black humor"; "a grim joke"; "grim laughter"; "fun ranging from slapstick clowning ... to savage mordant wit"
(synonym) black, grim
(similar) sarcastic
mordant
adj.
cutting, biting, mordant; caustic, corrosive; acrid, acrimonious; incisive, mordacious; pungent, trenchant, vitriolic
mordant
nm.
mordent
mordre
v.
bite, catch, take; snap, strike
Mordant
(v. t.)
To subject to the action of, or imbue with, a mordant; as, to mordant goods for dyeing.
(n.)
Any substance, as alum or copperas, which, having a twofold attraction for organic fibers and coloring matter, serves as a bond of union, and thus gives fixity to, or bites in, the dyes.
(n.)
Any sticky matter by which the gold leaf is made to adhere.
(n.)
Any corroding substance used in etching.
(a.)
Serving to fix colors.
(a.)
Biting; caustic; sarcastic; keen; severe.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter.
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