diff --git a/src/ontology/uberon-edit.obo b/src/ontology/uberon-edit.obo
index 82507fa03..d1d76db70 100644
--- a/src/ontology/uberon-edit.obo
+++ b/src/ontology/uberon-edit.obo
@@ -219072,6 +219072,7 @@ relationship: part_of UBERON:6000171 ! insect embryonic abdomen
 [Term]
 id: UBERON:6000186
 name: insect embryonic optic lobe primordium
+def: "Primordium of the insect embryo that gives rises to the embryonic/larval optic anlage." [ISBN:9783540570790]
 synonym: "optic lobe placode" RELATED []
 synonym: "optic lobe primordium" RELATED []
 is_a: UBERON:0001048 ! primordium
@@ -219618,7 +219619,7 @@ consider: UBERON:6001790
 [Term]
 id: UBERON:6001842
 name: insect embryonic/larval digestive system
-def: "." [FlyBase:FBrf0007733, FlyBase:FBrf0064792]
+def: "Digestive system of the insect embryo or larva." [ISBN:9780879698287, ISBN:9780879698997]
 synonym: "larval digestive system" EXACT []
 is_a: UBERON:0001007 ! digestive system
 relationship: only_in_taxon NCBITaxon:50557 ! Insecta
@@ -219862,7 +219863,7 @@ relationship: part_of UBERON:6003218 ! insect adult muscle system
 [Term]
 id: UBERON:6003559
 name: insect adult nervous system
-def: "." [FlyBase:FBrf0002482, FlyBase:FBrf0007196, FlyBase:FBrf0007735, FlyBase:FBrf0034076]
+def: "Nervous system of the adult insect." [ISBN:978-087969828-7]
 is_a: UBERON:0001016 ! nervous system
 relationship: only_in_taxon NCBITaxon:50557 ! Insecta
 relationship: part_of UBERON:0007023 ! adult organism
@@ -220010,7 +220011,7 @@ relationship: part_of UBERON:6004520 ! insect mouthpart
 [Term]
 id: UBERON:6004551
 name: insect adult external thorax
-def: "." [FlyBase:FBrf0006943]
+def: "External structures that make up the adult insect thorax." [ISBN:9780879698287]
 is_a: UBERON:6007289 ! insect tagmatic subdivision of integument
 relationship: part_of UBERON:6003018 ! insect adult thorax
 relationship: part_of UBERON:6005396 ! insect adult integumentary system
@@ -220321,6 +220322,7 @@ relationship: only_in_taxon NCBITaxon:50557 ! Insecta
 [Term]
 id: UBERON:6005467
 name: insect lymph gland primordium
+def: "Primordium of the insect embryo that gives rise to the embryonic/larval lymph gland." [ISBN:9783540570790]
 synonym: "lymph gland specific anlage" RELATED []
 is_a: UBERON:0002050 ! embryonic structure
 is_a: UBERON:6005461 ! insect circulatory system primordium
@@ -220383,7 +220385,7 @@ relationship: part_of UBERON:0000922 ! embryo
 [Term]
 id: UBERON:6005558
 name: insect ventral ectoderm
-def: "." [FlyBase:FBrf0089570]
+def: "Ventral part of the insect trunk ectoderm." [ISBN:9783540570790]
 synonym: "P2 VenEc" RELATED [FBC:DOS]
 synonym: "venEc" RELATED []
 is_a: UBERON:0005423 ! developing anatomical structure
@@ -220417,6 +220419,7 @@ relationship: part_of UBERON:6001731 ! insect larval ocular segment
 [Term]
 id: UBERON:6005830
 name: insect Bolwig organ primordium
+def: "Primordium of the insect embryo that gives rise to the larval Bolwig organ." [ISBN:9783540570790]
 synonym: "Bolwig's organ primordium" EXACT []
 synonym: "P1 BolOrg" RELATED [FBC:DOS]
 is_a: UBERON:0001048 ! primordium
@@ -220644,6 +220647,7 @@ consider: FBbt:00007435
 [Term]
 id: UBERON:6016022
 name: insect abdominal histoblast primordium
+def: "A primordium of the insect embryo that gives rise to the larval abdominal histoblast nests." [ISBN:9780879698997]
 synonym: "abdominal histoblast specific anlage" RELATED []
 is_a: UBERON:0001048 ! primordium
 is_a: UBERON:0002050 ! embryonic structure
@@ -220654,6 +220658,7 @@ relationship: part_of UBERON:0000922 ! embryo
 [Term]
 id: UBERON:6017021
 name: insect abdominal histoblast anlage
+def: "A population of cells of the insect epidermis primordium that give rises to the abdominal histoblast primordium." [ISBN:9780879698997]
 is_a: UBERON:0002050 ! embryonic structure
 is_a: UBERON:0007688 ! anlage
 relationship: dc-contributor https://orcid.org/0000-0001-9676-7393
@@ -220663,6 +220668,7 @@ relationship: part_of UBERON:0000922 ! embryo
 [Term]
 id: UBERON:6025991
 name: insect anterior ectoderm derivative
+def: "An insect embryonic structure that develops from the anterior ectoderm." [ISBN:9783540570790]
 is_a: UBERON:0004121 ! ectoderm-derived structure
 relationship: dc-contributor https://orcid.org/0000-0002-7073-9172 ! David Osumi-Sutherland
 relationship: develops_from UBERON:6000119 ! insect anterior ectoderm
@@ -220670,6 +220676,7 @@ relationship: develops_from UBERON:6000119 ! insect anterior ectoderm
 [Term]
 id: UBERON:6025993
 name: insect ventral ectoderm derivative
+def: "An insect embryonic structure that develops from the ventral ectoderm." [ISBN:9783540570790]
 is_a: UBERON:0004121 ! ectoderm-derived structure
 relationship: dc-contributor https://orcid.org/0000-0002-7073-9172 ! David Osumi-Sutherland
 relationship: develops_from UBERON:6005558 ! insect ventral ectoderm
@@ -220677,6 +220684,7 @@ relationship: develops_from UBERON:6005558 ! insect ventral ectoderm
 [Term]
 id: UBERON:6026000
 name: insect trunk mesoderm derivative
+def: "An insect embryonic structure that develops from the trunk mesoderm." [ISBN:9783540570790]
 is_a: UBERON:0004120 ! mesoderm-derived structure
 relationship: dc-contributor https://orcid.org/0000-0002-7073-9172 ! David Osumi-Sutherland
 relationship: develops_from UBERON:6000128 ! insect trunk mesoderm
@@ -220685,6 +220693,7 @@ relationship: in_taxon NCBITaxon:6656 {source="https://github.com/obophenotype/u
 [Term]
 id: UBERON:6026002
 name: insect visceral mesoderm derivative
+def: "An insect embryonic structure that develops from the visceral mesoderm." [ISBN:9783540570790]
 is_a: UBERON:6026000 ! insect trunk mesoderm derivative
 relationship: dc-contributor https://orcid.org/0000-0002-7073-9172 ! David Osumi-Sutherland
 relationship: develops_from UBERON:6000130 ! insect visceral mesoderm