köken: From Dutch lakmoes, from Middle Dutch lecmoes, a compound of the cognates of German lecken (“to leak”) and Mus (“mush”). The former was later adapted to Dutch lak, German Lack (“varnish”). It seems obvious that there is a relation between Middle Dutch lecmoes and synonymous Old Norse litmosi (whence English litmus), but the nature of this relation is unsettled.
Papier imbibé de teinture de tournesol, un indicateur coloré qui permet de déterminer le pH d’une solution : il est rouge au contact d’un acide et reste bleu au contact d’une base, avec des teintes intermédiaires à différents pH.
köken: From Middle Dutch lecmoes (1252), Middle Dutch lijcmoes (1459), early modern Dutch leeckmoes (1514), modern Dutch lackmoes (ca. 1620 and 1679). Equivalent to lekken + moes, the first element was later adapted by folk etymology to lak. Likely related to Old Norse litmosi, but the details of how they are related remain unclear.