| the expanding and contracting opening in the iris of the eye, through which light passes to the retina |
| a soft, fatty, vascular tissue in the interior cavities of bones that is a major site of blood cell production |
lacrimal lac·ri·mal or lach·ry·mal (lāk'rə-məl)
adj.
Of or relating to tears.
Of, relating to, or constituting the glands that produce tears.