hepta-
Greek for seven
Hepta- is a prefix meaning seven, from Greek.
It appears in technical and scientific vocabulary: a heptagon has seven sides, a heptathlon comprises seven events, heptane is a hydrocarbon with seven carbon atoms.
The prefix is less common than its Latin equivalent septi-.
Multisided plane figure
- verticesCorner points of shapes
- anglesRotation between intersecting lines
- regularOccurring at fixed intervals
- irregularDeviating from normal patterns
tessellation · sides · symmetry · geometry
All-carbon-and-hydrogen compound
Measure of relative size
- diatonicSeven-tone scale-based
- modesManners of operation
- intervalsGaps between events
- octaveEight-note interval
tones · pitch · melody · major · minor · Ionian · notes · tuning
Folded amino chain
- subunitPart of larger entity
- polymerLarge repeated-unit molecule
- chromosomeDNA strand carrying genes
- botanyScience of flora
seven
Fourth prime number
polygon
Multisided plane figure
- verticesCorner points of shapes
- anglesRotation between intersecting lines
- regularOccurring at fixed intervals
irregular · tessellation · sides · symmetry · geometry
hydrocarbon
All-carbon-and-hydrogen compound
scale
Measure of relative size
octave · tones · pitch · melody · major · minor · Ionian · notes · tuning
protein
Folded amino chain
- subunitPart of larger entity
- polymerLarge repeated-unit molecule
- chromosomeDNA strand carrying genes
septennial
Lasting seven years
duration · calendar · interval · anniversary · reign · epoch