pro-knock
adjective
Tending to cause knocking when present in the fuel used in an internal-combustion engine.
noun
A substance having this property.
Origin
1920s.
- parasympathetic
- parasympatheticomimetic
- parasympatholytic
- parasympathomimetic
- parasynapsis
- parasynaptic
- parasynthesis
- parasynthetic
- parasynthetically
- parasyntheton
- parasyphilitic
- paratacamite
- paratactic
- paratactical
- paratactically
- paratartaric
- parataxic
- parataxis
- paratectonic
- paratellurite
- paraterminal
- paratha
- parathecial
- parathecium
- parathesis