acyclovir
UK[eɪˈsaɪ.klə.vɪər]US[eɪˈsaɪ.kloʊ.vɪr]
n
An antiviral drug used to treat infections caused by herpes viruses, including cold sores, genital herpes, chickenpox, and shingles.
Morpheme Breakdown
a
cycl
o
vir
a
not/without
cycl
ring/cycle
o
vir
virus
Etymology
The name "acyclovir" is a modern scientific coinage that logically describes the drug's molecular structure and function. It is constructed from international scientific vocabulary elements: the prefix a- (not) negates the root cycl (ring), indicating the molecule lacks the cyclic sugar ring found in normal nucleosides. This modified structure is then linked by the connective -o- to the root vir (virus), specifying its target. Thus, the term literally means "lacking a cyclic ring, active against a virus," elegantly capturing its mechanism as an antiviral agent that selectively inhibits viral DNA replication by mimicking a nucleoside building block but lacking the complete structure necessary for normal chain elongation.
Analysis
Structure: a (not/without) + cycl (ring/cycle) + o + vir (virus)
a-: A prefix of Greek origin, meaning "not" or "without." It functions as a negative or privative prefix.
cycl: A root from Greek kyklos, meaning "ring" or "circle." In chemistry, it refers to a cyclic (ring-shaped) structure.
-o-: A connecting vowel, typically of Greek origin, used to join word elements.
vir: A root from Latin virus, meaning "poison" or "slime." In modern scientific use, it refers specifically to a virus.
Examples
Acyclovir is commonly prescribed to manage outbreaks of genital herpes.
The doctor recommended applying acyclovir cream at the first sign of a cold sore.
Intravenous acyclovir can be a critical treatment for severe herpes infections in immunocompromised patients.