English
legionellal
From legionella + -al.
Formed from legionella + -al
Proto-Indo-European *leǵ- ‘to gather’
Proto-Indo-European *léǵeti
Proto-Italic *legō
Latin legō ‘to choose’
Latin legio ‘a legion’
English legionella
Today it means
adj Of or relating to legionella.
Language periods are conventional ranges, not dates for this word.
Etymograph / legionellal