( ( Lenticular ( ( A ( lens-shaped deposit ) ) ( having ( ( roughly ( the form ) ) ( of ( a ( double ( convex lens ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Lenticular) (NP (NP (DT A) (JJ lens-shaped) (NN deposit)) (VP (VBG having) (NP (NP (RB roughly) (DT the) (NN form)) (PP (IN of) (NP (DT a) (JJ double) (NN convex) (NN lens))))))) (. .)))
Lenticular A lens-shaped deposit having roughly the form of a double convex lens.
(ROOT (S (NP (DT The) (ADJP (RBS most) (JJ common)) (JJ two-lens) (NN telescope)) (, ,) (PP (IN like) (NP (DT the) (JJ simple) (NN microscope))) (, ,) (VP (VBZ uses) (NP (NN convex) (NNS lenses))) (. .)))