prismaˈtoidal, a.
[f. as prec. + -al1.]
a. Resembling a prism. b. ‘In the form of or connected with a prismatoid’ (Cent. Dict.). c. = prismoidal.
| 1821 Ure Dict. Chem. s.v. Zeolite, Prismatoidal zeolite, or stilbite. 1821 [see prismato-]. 1858 [see prec.]. 1876 Catal. Sci. App. S. Kens. Mus. §10 Estimator. A sliding rule, by which the volume of prismatoidal bodies (embankments, ditches, cuttings, &c., occurring in the construction of rail⁓roads, canals, fortifications, &c.) is calculated mechanically. |