Chemistry • The
methylidyne radical (a carbyne); CH• (or •CH), CH3• (or
⫶CH) • The
methylidyne group ≡CH • The
methine group (methanylylidene, methylylidene) =CH−
Mathematics and computing •
Chomsky hierarchy, in computer science, a containment hierarchy of classes of formal grammars •
Continuum hypothesis, in set theory •
Hyperbolic cosine, in mathematics, a hyperbolic function, ch(x) = cosh(x) •
Curry–Howard correspondence, the relationship between computer programs and mathematical proofs •
CH register, the high byte of an X86 16-bit CX register •
Ch (computer programming), a cross-platform C/C++ interpreter •
Contraction hierarchies, in computer science, a speed-up technique for finding shortest paths in a graph
Medicine •
Cholesterol •
Cluster headache •
Congenital hypothyroidism, a condition of thyroid hormone deficiency present at birth •
Cerebellar hypoplasia, characterized by reduced cerebellar volume •
Cerebellar hypoplasia (non-human) •
French catheter scale (Charrière), a scale for medical catheters, also abbreviated as
Fr •
Children's hospital Military technology •
Cargo helicopter (U.S. military helicopter alpha-numeric prefix) •
Chain Home, a World War II radar array •
Heavy cruiser (U.S. Navy ship code CH, standing for "Cruiser, Heavy")
In other sciences •
Clay of high plasticity (USCS soil type CH) •
Cassini-Huygens ==Places==