You pronounce it: [sim-yuh-ley-kruh m]
noun, plural simulacra [sim-yuh-ley-kruh] (Show IPA)
1. a slight, unreal, or superficial likeness or semblance.
2. an effigy, image, or representation:
“a simulacrum of Aphrodite.”
1590-1600; < Latin simulācrum likeness, image, equivalent to simulā (re) to simulate + -crum instrumental suffix
I found it while reading a class presentation handout for Cloud Atlas by David Mitchell:
This is like Pilgrim’s Progress simulacrums, which are the concept of copies of something for which there is no original.