† myrtetumn.
Origin: A borrowing from Latin. Etymon: Latin myrtētum.
Etymology: < classical Latin myrtētum myrtle grove < myrtus myrtle (see myrt n.) + -ētum -etum suffix.
Obsolete.
rare.
1688 J. Evelyn (1955) IV. 576 We went to Kew, to Visite Sir Hen: Capels, whose Orangerie & Myrtetum, are most beautifull.
This is a new entry (OED Third Edition, June 2003; most recently modified version published online March 2019).