SINCE 1828
Acanthodii
plural noun
Ac·an·tho·dii
| \ ˌaˌkanˈthōdēˌī, ˌakən-\
Definition of Acanthodii
: a subclass of Placodermi comprising primitive Paleozoic fishes having the anterior margin of each fin supported by a stout spine and often having one or more pairs of spines similar to the fin spines along the lower lateral part of the body between the paired fins of each side
Keep scrolling for more
Comments on Acanthodii
What made you want to look up Acanthodii? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Time Traveler Quiz: Which Word Came First?
-
- Which came first?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Word Games
-
Time Traveler Quiz: Which Word Came First?
Which word entered the English language first?
Take the quiz -
Slippery Words Quiz—Changing with the Times
Do you know these earlier meanings of words?
Take the quiz -
Spell It
Can you spell these 10 commonly misspelled words?
Take the quiz -
Citation
Do you know the person or title these quotes describe?
Play the game
Share Acanthodii
Resources for Acanthodii