Meanings
nounmegatheroid (plural megatheroids)
plural megatheroids
- biologyOne of a family of extinct edentates found in America, including the megatherium and the megalonyx, among others.
The more striking phenomena first and most strongly impress the mind, which contrasts for example, the great Cave-Bears of Europe with the actual Brown Bear, the Megatheroids of South America with the small existing sloths, and the gigantic Glyptodons with the Armadillos.
1851 June 11, The Geelong Advertiser, Victoria, page 1, column 2
Origin
From translingual Megatherium + -oid.
Full word history & related roots →Cite this entry
APA
megatheroid. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/megatheroid
MLA
“megatheroid.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/megatheroid. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “megatheroid,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/megatheroid.
Source: megatheroid on Wiktionary, CC BY-SA 4.0.