Sentence:  Harvested as <WSD>baby carrots</WSD>, these varieties, planted early in the season, averaged 74 micrograms of carotene per gram of sample (range by varieties, 70 to 85 micrograms); corresponding samples harvested as mature carrots of at least 2 inches crown diameter averaged 180 micrograms per gram (range, 146 to 255). 
Meaning of the word marked with <WSD> tags:  A carrot harvested and sold when immature and of a small size.