(archaic) biliverdin

Moho braccatus, an extinct bird of Hawaii.

plural of OOAK

Leather made from sheep and calf skins by mechanically forcing ooze through them; especially, such leather with a soft, finely granulated finish (sometimes called velvet finish) applied to the flesh side for special purposes. Ordinary ooze leather is used for shoe uppers, in bookbinding, etc.

(military) Initialism of Observe, Orient, Decide, and Act (a decision cycle for military combat operations and other processes)

plural of ooblast

(biology) A cell that develops into an ovum; a germinal epithelium giving rise to ova.

(initialism) out of box

Initialism of out-of-body experience or out-of-the-body experience. / Initialism of out-of-box experience.

plural of oof-bird