Good Day from Ottawa! I should be playing golf but it is -1C and raining. Only need help with 2 today: 1D: Path of light produced by the scattering action of suspended particles; T_N_A_L_E_M and 8D: a grass related to sugarcane: D_R_A
Not sure of the word you require, but is it something to do with John Tyndall. When you read up on him it tells you what you are asking. Just a suggestion as to where you might look. Hope this helps.