> as lemmas
heptatomic
heptatomic adj.
Brit. 
/ˌhɛptəˈtɒmɪk/
, /ˌhɛptəˈtɒmɪk/U.S. /ˌhɛptəˈtɑmɪk/
[atomic adj. and n.] Chemistry containing or equivalent to seven atoms./ˌhɛptəˈtɑmɪk/ΘΚΠ
the world > matter > chemistry > atomic chemistry > [adjective] > relating to molecules > by number of atoms
monatomic1848
pentatomic1858
ter-atomic1861
tetratomic1862
triatomic1862
diatomic1866
hexatomic1868
octatomic1875
heptatomic1886
monadic1907
1886 Crookes in Rep. Brit. Assoc. 573 Fluorine mon- and heptatomic.
<
as lemmas
- counteraddress
- counteradmiral
- counteradvantage
- counteradvise
- counteraffirm
- counteraffirmation
- counteragency
- counteragent
- counteragents
- counteragitation
- counteralliance
- counterambush
- counterannouncement
- counteranswer
- counterantidote
- counterapostle
- counterappeal
- counterappellant
- counterapproach
- counterarch
- counterarched
- counterargue
- counterargued
- counterargues
- counterarguing