The Collaborative International Dictionary
Myriagramme
Myriagram \Myr"i*a*gram\, Myriagramme \Myr"i*a*gramme\, n. [F. myriagramme. See Myria-, and 3d Gram.] A metric weight, consisting of ten thousand grams or ten kilograms. It is equal to 22.046 lbs. avoirdupois.
Wiktionary
myriagramme
n. (alternative form of myriagram English)