This word is acceptable for play in the UK dictionary that is being used in the following games:

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adj. Shaped like a lens.

adj. Lenticular.

Having the form of a lens; lenticular: as, the lentiform nucleus of the striate body of the brain.

adj. convex on both sides; shaped like a lentil

"Similarly, if the world had some other figure with unequal radii, if, for instance, it were lentiform, or oviform, in every case we should have to admit space and void outside the moving body, because the whole body would not always occupy the same room."

convex    bulging   

lenticular