diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
index 56737c0ae4..2c0f739752 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
@@ -249,6 +249,7 @@ module ActiveRecord
         define_column_methods :bigint, :binary, :boolean, :date, :datetime, :decimal,
           :float, :integer, :json, :string, :text, :time, :timestamp, :virtual
 
+        alias :blob :binary
         alias :numeric :decimal
       end
 
@@ -564,6 +565,7 @@ module ActiveRecord
     #     t.time
     #     t.date
     #     t.binary
+    #     t.blob
     #     t.boolean
     #     t.foreign_key
     #     t.json
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
index 0c5cdf62e4..bbdd19ca89 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
@@ -523,7 +523,7 @@ module ActiveRecord
       # <tt>:primary_key</tt>, <tt>:string</tt>, <tt>:text</tt>,
       # <tt>:integer</tt>, <tt>:bigint</tt>, <tt>:float</tt>, <tt>:decimal</tt>, <tt>:numeric</tt>,
       # <tt>:datetime</tt>, <tt>:time</tt>, <tt>:date</tt>,
-      # <tt>:binary</tt>, <tt>:boolean</tt>.
+      # <tt>:binary</tt>, <tt>:blob</tt>, <tt>:boolean</tt>.
       #
       # You may use a type not in this list as long as it is supported by your
       # database (for example, "polygon" in MySQL), but this will not be database
@@ -532,7 +532,7 @@ module ActiveRecord
       # Available options are (none of these exists by default):
       # * <tt>:limit</tt> -
       #   Requests a maximum column length. This is the number of characters for a <tt>:string</tt> column
-      #   and number of bytes for <tt>:text</tt>, <tt>:binary</tt>, and <tt>:integer</tt> columns.
+      #   and number of bytes for <tt>:text</tt>, <tt>:binary</tt>, <tt>:blob</tt>, and <tt>:integer</tt> columns.
       #   This option is ignored by some backends.
       # * <tt>:default</tt> -
       #   The column's default value. Use +nil+ for +NULL+.
diff --git a/activerecord/test/cases/schema_dumper_test.rb b/activerecord/test/cases/schema_dumper_test.rb
index 346f9a5e77..547a685866 100644
--- a/activerecord/test/cases/schema_dumper_test.rb
+++ b/activerecord/test/cases/schema_dumper_test.rb
@@ -238,6 +238,12 @@ class SchemaDumperTest < ActiveRecord::TestCase
     assert_match %r{t\.float\s+"temperature"$}, output
   end
 
+  def test_schema_dump_aliased_types
+    output = standard_dump
+    assert_match %r{t\.binary\s+"blob_data"$}, output
+    assert_match %r{t\.decimal\s+"numeric_number"}, output
+  end
+
   if ActiveRecord::Base.connection.supports_expression_index?
     def test_schema_dump_expression_indices
       index_definition = dump_table_schema("companies").split(/\n/).grep(/t\.index.*company_expression_index/).first.strip
diff --git a/activerecord/test/schema/schema.rb b/activerecord/test/schema/schema.rb
index 02b75a24e4..31de9c9fc3 100644
--- a/activerecord/test/schema/schema.rb
+++ b/activerecord/test/schema/schema.rb
@@ -86,6 +86,7 @@ ActiveRecord::Schema.define do
     t.string :name
     t.binary :data
     t.binary :short_data, limit: 2048
+    t.blob :blob_data
   end
 
   create_table :birds, force: true do |t|
@@ -652,6 +653,7 @@ ActiveRecord::Schema.define do
     t.decimal :my_house_population, precision: 2, scale: 0
     t.decimal :decimal_number
     t.decimal :decimal_number_with_default, precision: 3, scale: 2, default: 2.78
+    t.numeric :numeric_number
     t.float   :temperature
     t.decimal :decimal_number_big_precision, precision: 20
     # Oracle/SQLServer supports precision up to 38