from The Century Dictionary and Cyclopedia
- n. The so-called yolk-cavity of a meroblastic ovum; the central space in the yellow food-yolk of such an egg, as a bird's, where there is an interior ball of white yolk, connected by a thread of the same substance with the tread or cicatricula on the surface of the yolk.
Sorry, no etymologies found.
Latibulum is okay, but I hope you like latebra, lair, as much as I do. oh, yes!
From the tread a thin column of the white yelk penetrates through the yellow yelk to the centre of the globular cell, where it swells into a small, central globule (wrongly called the yelk-cavity, or latebra, Figure 1.15 d apostrophe).
domicilium = abode, dwelling-place domus = home, house latibulum = hiding-place, retreat, subterfuge latebra = hiding-place, den, lair