diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f0fbd5..9a884fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - Minor improvements to README, CONTRIBUTING docs, developer experience. ([@brews](https://github.com/brews), [PR#42](https://github.com/ClimateImpactLab/isku/pull/42))
+- Mention "segment weights" in `GridWeightingRegions` API docs. ([@brews](https://github.com/brews), [PR#60](https://github.com/ClimateImpactLab/isku/pull/60))
 
 
 ## [0.3.0] - 2026-05-15
diff --git a/src/isku/extract.py b/src/isku/extract.py
index 56168b9..e61b457 100644
--- a/src/isku/extract.py
+++ b/src/isku/extract.py
@@ -92,6 +92,8 @@ class GridWeightingRegions(RegionExtractor):
 
     'weights' dataset must have "lat", "lon", "weight", "region".
 
+    These are sometimes called "segment weights".
+
     Raises
     ------
     ValueError