Where two toes overlap, it will be observed that there is a deeper shadow, like the section of a biconvex lens.
Then comes the biconvex crystalline lens L, an elastic gelatinous-looking solid, which is easily distorted by pressure.
The ovum now assumes somewhat the form of a biconvex lens, in the axis of which the central perforation is still present.
The first differs from all the other vertebrae of the body in having a biconvex centrum.
The holochroal eyes are of two kinds, one with plano-convex and one with biconvex lenses.
Grain is narrow, obovoid, biconvex, with two grooves on the anterior side and with a long embryo.
In 671 Scolopendra, where there are four, the corneal lens is a biconvex thickening of the cuticle.
The atlas (fig. 71) is remarkable, consisting of four pieces, and the first caudal is biconvex.
Disk a rather flattened, biconvex lens, about twice as broad as thick.
The first caudal vertebra of modern Crocodilia is biconvex, and in the Chelonia all types of vertebral centra are found.
biconvex bi·con·vex (bī'kŏn-věks', bī-kŏn'věks')
Convex on both sides or surfaces.