diff --git a/src/ontology/uberon-edit.obo b/src/ontology/uberon-edit.obo
index fd51d6786..f20ce402a 100644
--- a/src/ontology/uberon-edit.obo
+++ b/src/ontology/uberon-edit.obo
@@ -224517,6 +224517,20 @@ relationship: dc-contributor https://orcid.org/0000-0001-6677-8489 ! Aleix Puig-
 relationship: located_in UBERON:8600025 ! intervillous space
 property_value: dcterms-date "2024-04-15T10:05:35Z" xsd:dateTime
 
+[Term]
+id: UBERON:8850000
+name: lumen of pulmonary alveolus
+def: "An anatomical cavity that is part of the alveolus of the lung" [PMID:30390118]
+synonym: "alveolar lumen" BROAD [PMID:30390118]
+synonym: "cavity of pulmonary alveolus" EXACT [FMA:62779]
+synonym: "lumen of alveolus" BROAD [PMID:33806395]
+synonym: "pulmonary alveolar cavity" EXACT [FMA:62779]
+xref: FMA:62779
+intersection_of: UBERON:0002553 ! anatomical cavity
+intersection_of: luminal_space_of UBERON:0002299 ! alveolus of lung
+relationship: dc-contributor https://orcid.org/0009-0000-8480-9277
+property_value: dcterms-date "2024-06-28T10:50:18Z" xsd:dateTime
+
 [Typedef]
 id: aboral_to
 name: aboral to