epiphyseal plate the thin plate of cartilage between the epiphysis and the shaft of a long bone; it is the site of growth in length and is obliterated by epiphyseal closure. equatorial plate the collection of chromosomes at the equator of the spindle in mitosis.
howell-jolly body. n. A spherical granule often observed in the stroma of a red blood cell, especially after a splenectomy.
Rigid-hulled inflatable boat. For boats similar to RIBs but with rigid tubes, see Rigid buoyant boat. A rigid-hulled inflatable boat (RHIB) or rigid-inflatable boat (RIB) is a lightweight but high-performance and high-capacity boat constructed with a solid, shaped hull and flexible tubes at the gunwale. The design is stable and seaworthy.