C4 pathway A pathway of carbon fixation, found most commonly in tropical plants that have high rates of growth and photosynthesis and that are adapted to high temperatures, strong light, low carbon dioxide levels, and low water supply. Its importance lies mainly in its reduction of photorespiration.
PT 100 RTD means Resistance temperature detector(RTD) of platinum with 100 ohms resistance at zero degree centigrade.
1 TID, also t.i.d., is a medical abbreviation for ter in die, meaning to give medication three times a day.  QID also q.i.d, is a medical abbreviation which means to give the medication four times a day.