water molecule
IRI: https://spec.industrialontologies.org/ontology/construct/WaterMolecule
Defined In: https://spec.industrialontologies.org/ontology/biopharma/MolecularEntity/
SubClass Of: inorganic molecular entity
Class Hierarchy
owl:Thing › bfo:entity › bfo:continuant › bfo:independent continuant › bfo:material entity › molecular entity › inorganic molecular entity › water molecule
Definition
inorganic molecular entity consisting of an oxygen atom that is covalently bonded to two hydrogen atoms
Explanatory Notes
1) Water molecule refers to the molecular entity H₂O, not to a bulk water material, aqueous solution, or other water-containing mixture. In laboratory and biomanufacturing usage, ‘water’ often refers to materials composed primarily of water molecules, such as Purified Water, Water for Injection, buffers, media, or other aqueous materials. These bulk materials and mixtures should be modeled separately from the water molecule itself. 2) Water molecules may occur in isotopic variants, such as heavy water (D₂O) or semi-heavy water (HDO). These variants have the same atom-connectivity pattern as H₂O but differ in hydrogen isotope composition.
Examples
- H₂O (ordinary water); D₂O (heavy water); HDO (semi-heavy water)
Adapted From
- http://purl.obolibrary.org/obo/CHEBI_15377
Primitive Class
This class is declared primitive and it does not have necessary and sufficient condiftions defined.
Primitive Rationale
See the primitive rationale under molecular entity
Formal Axioms
First-Order Logic Axioms
WaterMolecule(x) → InorganicMolecularEntity(x)
Semi-Formal Natural Language Axioms
if x is a ‘water molecule’ then x is an ‘inorganic molecular entity’