ryhmänopeus

== Finnish == === Etymology === ryhmä +‎ nopeus === Pronunciation === IPA(key): /ˈryhmæˌnopeus/, [ˈryçmæˌno̞pe̞us̠] Rhymes: -opeus Syllabification(key): ryh‧mä‧no‧pe‧us Hyphenation(key): ryhmä‧nope‧us === Noun === ryhmänopeus (physics) group velocity ==== Declension ====