Malt Terms
Malt Terms · malting science vocabulary
Malting has its own vocabulary that bridges agronomy and brewing. These definitions cover the terms used in the malting and malt quality sections of this site.
| Term | Definition |
|---|---|
| Acrospire | The embryonic shoot of a germinating grain. Acrospire length relative to grain length is a primary indicator of germination progress and modification level. |
| Chit | The earliest visible sign of germination — the rootlet tip breaking through the hull. Used as a trigger point in some malting protocols. |
| Diastatic power (DP) | Total enzyme activity of a malt, expressed in degrees Lintner (°L). Minimum for self-conversion is ~35°L; GF base malts vary from near zero (buckwheat) to 80–120°L (millet). |
| Extract yield | The fermentable and non-fermentable soluble material produced per unit of malt. Expressed as a percentage on a dry basis. A primary measure of malt quality and brewing efficiency. |
| Fine/coarse difference | The difference in extract yield between finely milled and coarsely milled malt. A small F/C difference indicates good modification; a large difference signals under-modification. |
| Friability | A measure of how easily a malt kernel breaks down under pressure. High friability indicates well-modified malt; low friability suggests the malt structure is intact and modification is incomplete. |
| Kilning | The final drying and curing step in malting. Kilning temperature and time determine malt color, flavor intensity, and enzyme retention. Higher temperatures produce darker, more flavorful malts but destroy enzymes. |
| Modification | The degree to which malt proteins and cell walls have been broken down during germination. Affects mash performance, extract yield, and wort clarity. |
| Steeping | The first stage of malting — soaking grain in water to raise moisture content from ~12% to 42–45% and initiate germination. |
| Wort color (EBC/SRM) | A measure of wort or beer color. EBC (European Brewery Convention) and SRM (Standard Reference Method) are the two common scales. SRM = EBC × 0.508. |
Source Notes
Malt term definitions based on MBAA Technical Quarterly references, EBC Analytica, and GF malting science literature.