Usage examples:

• It's not blood; it is ichor J. Sheridan LeFanu in "The Room in the Dragon Volant".

• Her life, so concentrated, so self- absorbed, seemed more of an essence, potently distilled, compared with this abounding ichor of existence, that audibly sang in brimming circulation through the veins of this carelessly immortal earth. Richard Le Gallienne in "The Worshipper of the Image".

• His heart burned within him; memories of Cornelia closed his eyes, and then filled them with adorable visions of her pure, fresh loveliness; his pulses bounded; his blood ran warm and free as the ethereal ichor of the gods. Amelia E. Barr in "The Maid of Maiden Lane".