acrospire
/ˈækroʊˌspaɪər/
noun
- The first shoot or sprout that appears from a germinating seed, especially in barley or other grains.
- The length of the acrospire helps brewers determine the best time to stop germination.
- Each tiny acrospire pushed through the soil after the spring rains.
- The farmer checked the acrospire to see if the barley was ready for malting.