16-letter words containing d, i, c, a, m, p
- ramsden eyepiece — an eyepiece consisting of two plano-convex crown-glass lenses of equal focal length, placed with the convex sides facing each other and with a separation between the lenses of about two-thirds of the focal length of each.
- thermoacidophile — any organism, especially a type of archaebacterium, that thrives in strongly acidic environments at high temperatures.