ODM2 Controlled Vocabularies
Login
New Request
Units Type
⤴
Make a request to add or modify a term.
Please enter a URI-friendly version of your term with no spaces, special characters, etc.
Term
*
Please enter the term as you would expect it to appear in a sentence.
Name
*
Please enter a detailed definition of the term.
Definition
When the temperature of a substance changes, the energy that is stored in the intermolecular bonds between atoms changes. When the stored energy increases, so does the length of the molecular bonds. As a result, solids typically expand in response to heating and contract on cooling; this dimensional response to temperature change is expressed by its coefficient of thermal expansion. Different coefficients of thermal expansion can be defined for a substance depending on whether the expansion is measured by: * linear thermal expansion * area thermal expansion * volumetric thermal expansion These characteristics are closely related. The volumetric thermal expansion coefficient can be defined for both liquids and solids. The linear thermal expansion can only be defined for solids, and is common in engineering applications. Some substances expand when cooled, such as freezing water, so they have negative thermal expansion coefficients.
You may suggest a category for the term. Refer to the vocabulary to see which categories have been used. You may also suggest a new category.
Category
Enter a note about where the term came from. If you retrieved the definition of the term from a website or other source, note that here.
Provenance
QUDT
If you retrieved the term from another formal vocabulary system, enter the URI of the term from the other system here.
Provenance uri
Please enter any additional notes you may have about the term.
Note
Default unit
Dimension symbol
Dimension length
Dimension mass
Dimension time
Dimension current
Dimension temperature
Dimension amount
Dimension light
Enter your name.
Submitter name
*
Enter your email address.
Submitter email
*
Please enter a brief description of the reason for your submission (e.g., Term does not exist yet, Term is needed for my data use case, etc.)
Request reason
*