Science / Weather / Rain: Precipitation in the form of liquid water droplets greater than 0.5 mm. If widely scattered, the drop size may be smaller. It is reported as 'R' in an observation and on the METAR. The intensity of rain is based on rate of fall. 'Very light' (R--) means that the scattered drops do not completely wet a surface. 'Light' (R-) means it is greater than a trace and up to 0.10 inch an hour. 'Moderate' (R) means the rate of fall is between 0.11 to 0.30 inch per hour. 'Heavy' (R+) means over 0.30 inch per hour.
Rain Verb Synonyms: rainfall, precipitation
Rain Noun Synonyms: precipitation, drizzle, sprinkle, downpour, shower, thunder-shower, cloudburst, rainstorm, squall, deluge, sunshower
Science / Biology / Midbrain: A network of neurons that connects with the forebrain and relays sensory signals to other integrating centers. MORE
Science / Geology / Trellis Drainage: A drainage pattern in which streams intersect at right angles. This forms in areas of long parallel valleys such as in folded mountain belts. Rivers occupy the valleys and tributary streams join them MORE