and Galan (i think it was Galan, if i am wrong a host of people will correct me!) defined the 4 indication of infection- Dolor, color, molar, solar! (pain, redness, swelling and heat..)

Molar, swelling, is commonly known to us as a tooth-- the back teeth that have "bump" or raised (swollen) ridges.. and color via a change in Spanish, gives use the Colorado river (the red river).

solar is more commonly associated with the sun, but the term in latin could be used to indicate the warmth of the sun too.. just as temperature can be used for an acutual measurement, (the temperture today in NY is 81° (f)., or just used to indicate warmer than usual, She is running a temperture.