acephalan
/(ˌ)eɪˈsɛfələn/ /(ˌ)eɪˈsɛf(ə)lən/ /(ˌ)eɪˈkɛfələn/Zoology. Now rare
adjective
Of the former invertebrate class Acephala; designating or relating to this class.
Origin
Mid 19th century (in an earlier sense). From Acephala + -an. With the use as adjective compare earlier acephalous.
- thermal efficiency
- thermal imaging
- thermal inversion
- thermalise
- thermalization
- thermalize
- thermally
- thermal neutron
- thermal noise
- thermal paper
- thermal printer
- thermal reactor
- thermal shock
- thermal spring
- thermal unit
- thermic
- thermic lance
- Thermidor
- Thermidorian
- thermion
- thermionic
- thermionic emission
- thermionics
- thermionic tube
- thermionic valve