intron
UK[ˈɪntrɒn]US[ˈɪntrɑːn]
n
A segment of a DNA or RNA molecule that does not code for proteins and is removed before the molecule is translated into a protein.
Morpheme Breakdown
intr
on
intr
within
on
unit/particle
Etymology
The term 'intron' is a modern scientific coinage, created in the late 20th century. It is a portmanteau formed from the prefix intra- ("within") and the suffix -on (denoting a unit or particle), directly reflecting its function as an intervening sequence within a gene. The word was deliberately constructed to contrast with 'exon' (from expressed sequence), drawing on classical roots to create precise, logical terminology for molecular biology. Its formation follows the pattern of established scientific vocabulary, using Latin and Greek-derived elements to describe newly discovered biological structures.
Analysis
Structure: intr (within) + on (unit/particle)
intr: From Latin intra, meaning "within, inside." It functions as a prefix indicating an interior location or state.
on: A suffix in English, often used in scientific terminology (e.g., proton, electron) to denote a unit, particle, or basic component. Its origin in this context is modeled on the Greek-derived suffix -on.
Examples
During RNA splicing, the intron is removed and the exons are joined together.
The presence of an intron can regulate gene expression.
Scientists study intron sequences to understand genetic evolution.