The terms diptych and triptych refer to art occurring in multiple panels, which may be joined (but not always). The panels may be of the same scene, split into pieces, or they may be separate scenes that are unified by a common theme.

From SUPERMAN'S PAL JIMMY OLSEN #145 (Jan 1972)

WOULD YOU CALL THIS A TRIPTYCH?

Edited, written and drawn by Kirby.

One of the 676 $85 1977 Kirby Marvel pages.

THE COMICS JOURNAL SITE FINALLY REVIEWS THE MOST RECENT KIRBY HISTORY BOOK

And they show 10% of the rare Kirby art that is presented in it.
Read it (or just look at the rare art) at:
http://www.tcj.com/reviews/the-secret-history-of-marvel-comics-jack-kirby-and-the-moonlighting-artists-at-martin-goodmans-empire/

A MASTERFUL MANIPULATION OF THE THREE PANEL LAYOUT TO SETUP A DRAMATIC FULL-PAGE CLOSE-UP.

A 60 YEAR MYSTERY SOLVED?

    This Kirby cover, derived from Joseph Hirsch‘s painting High Visibility Wrap, has been mentioned in the first two monthly Kirby columns at http://www.tcj.com/ leading to speculation whether it was a swipe or a homage. The answer depends on if the 1944 painting from the prolific American artist was well-known by the average comic consumer in 1954. 

    According to my research the first and most accessible pre-Internet place to see the painting (along with 136 other war-related paintings) was a book published in 1945 titled MEN WITHOUT GUNS. You can read the entire book for free at http://archive.org/details/MenWithoutGunsAbbottPaintings
     I did searches of indexes of numerous publications but couldn't find any indication that the painting had been published in any of them or had been exhibited in any museums from 1944 to 1954. 
     Master Researchers Michael Vassallo and Blake Bell have come up with new information and a more probable theory of where Kirby saw the cover-inspiring painting.  
    The answer is on page 84 of 
THE SECRET HISTORY OF MARVEL COMICS:
JACK KIRBY AND THE MOONLIGHTING ARTISTS
AT MARTIN GOODMAN'S EMPIRE.

Kirby created scientifically-evolved talking animals, post-disaster radiation-mutated talking animals...

and space alien talking animals 
(from CAPTAIN VICTORY)

Does Greg Theakston hate women or is Dewey Cassell misinformed?

Theakston credits this cover to Kirby and Sinnott but Cassell says it is penciled AND inked by Marie Severin...

When CCG grades this issue they credit the cover to Kirby and Verpoorten.

Script AND art by the King. If you know what series this triptych is from, on a Kirby Konnoisseur scale of 1 to 10 you are a 9

A MASTERFUL MANIPULATION OF THE THREE PANEL LAYOUT TO ACCENTUATE A DRAMATIC FULL-PAGER.

From CAPTAIN AMERICA #112

A tetraptych is a picture in four parts. Often the parts form a single image, divided as though seen through window-panes, but they may also be a connected group of separate images.

The first two issues of THE ETERNALS open with tetraptychs.