| aurora | (noun) an atmospheric phenomenon consisting of bands of light caused by charged solar particles following the earth's magnetic lines of force | - |
|---|
| (noun) the first light of day | Synonyms: break of day, break of the day, cockcrow, dawn, dawning, daybreak, dayspring, first light, morning, sunrise, sunup |
| auroral | (adjective) characteristic of the dawn | Synonyms: aurorean |
|---|
| (adjective) of or relating to the atmospheric phenomenon auroras | - |
| microradian | (noun) a unit of angular distance equal to one thousandth of a milliradian | - |
|---|
| perorate | (verb) deliver an oration in grandiloquent style | - |
|---|
| (verb) conclude a speech with a formal recapitulation | - |
| peroration | (noun) (rhetoric) the concluding section of an oration | - |
|---|
| (noun) a flowery and highly rhetorical oration | - |
| prorate | (verb) divide or assess proportionally | - |
|---|
| (verb) make a proportional settlement or distribution | - |
| proration | (noun) the proportional limitation of production or distribution of something (e.g. crude oil or natural gas) to some fractional part of the total capacity of each producer | - |
|---|
| sororal | (adjective) like or characteristic of or befitting a sister | Synonyms: sisterlike, sisterly |
|---|
| xeroradiography | (noun) radiography using X-rays and xerographic (rather than roentgenographic) techniques | - |
|---|