Of or relating to Arthur Machen (1863–1947), Welsh author and mystic, known for his influential supernatural, fantasy, and horror fiction.

(organic chemistry) A carotenoid (5R)-5-hydroxy-3-[(1E,3E,5E,7E,9E,11E,13E,15E,17E,19E,21E)-24-hydroxy-3,7,12,16,20,24-hexamethylpentacosa-1,3,5,7,9,11,13,15,17,19,21-undecaenyl]-2,4,4-trimethylcyc...

plural of number nine

simple past tense and past participle of redintegrate