If lateral movement is side to side..

what is the equivalent for up and down? Vertical doesn’t quite cut it. Perpendicular? But that suggests relationship to another predetermined line? And while we’re at it – back and forwards?

Fore and aft??

verteral. And longeral.

Bouncing 🙂

LONGITUDINAL.?

Radial.

What are we actually discussing anyway?

Should all be covered by Roll yaw pitch climb\descend accelerate/brake and errrr… go sideways?

Northwind has clearly been on the soup (or is überclever).
Lady Gresly can stick her nautical terms up her yacht.
And when my bike yaws, I know I’m in trouble – no need for that much airtime.
LONGITUDINAL looks like a winner for back and forth, though.
So a word that decribes movement within the vertical plane?

altitudinal?

elevational?

Reciprocating

Fore and aft

So we have lateral, longitudinal and altitudinal movement across the three dimensions.
The fourth and fifth dimensions can wait for another thread and glasgowdan can sail away with lady gresley in a beautiful pea green boat.

So a word that decribes movement within the vertical plane?

That’ll be ‘vertical’ then 😉

I’d say the three are lateral, longitudinal and vertical – so as per above

And while we’re at it – back and forwards?

LONGITUDINAL looks like a winner for back and forth, though

But isn’t. The word you are looking for is axial.

And the movement up and down would still be lateral, just in a different plane.

But what about transverse? Is it the same as lateral?

(And ‘axial’ implies an axis, so might better be paired with ‘radial’, which also implies an axis…:O)

Front to back
Side to side
Up and down

There! 🙂

Transverse relates to orientation (as opposed to longitudinally), think engines.

Yes axial and radial imply an axis, how else do you set a datum for the movement?

Reverse cowgirl! 😛

Shirley longitudinal goes with latitudinal rather than lateral???

Up and down movement is ‘heave’.

Dorso ventral movement

If “wobble” is sideways, “wibble” must be the opposite direction, shirley?

Jiggle

Surely it’s vertical if we’re talking bike/frame movement.

There are only 6 types of movement.
X, Y and Z translations, along 3 mutually perpendicular axis, and the 3 rotations about these axis.
So you define where X, Y and Z are, then it’s easy. For example, movement is a translation in X, or a rotation about Y.

Simple.

Surely Longitudinal Latitudinal and altitudinal only pertain to points on the earth’s surface and are constrained by datums (Greenwich Meridian, Equator, Sea Level). If you want to define movement relative to an obvious direction of travel, then front to back, side to side and up and down would suffice. Any other, more scientific definition within space would need movement to be defined relative to the XYZ axis as above.

What does lateral imply that vertical doesn’t?

There are only 6 types of movement.
X, Y and Z translations, along 3 mutually perpendicular axis, and the 3 rotations about these axis.
So you define where X, Y and Z are, then it’s easy. For example, movement is a translation in X, or a rotation about Y.

With all your postulating about X, Y and Z I think you have forgotten about the key direction in mtb’ing – W. Where the W stands for Wobble.

Simples

Up and down? Thats just plane normal.

Front to back
Side to side
Up and down

Front to back
Side to side
Up and down

this is also how I tell my 3-yr old to wipe his bum.

Having had time to think about this, I feel side to side should be replaced with left to right in order to remove any cause of ambiguity.

Linear

With all your postulating about X, Y and Z I think you have forgotten about the key direction in mtb’ing – W. Where the W stands for Wobble.

No.
Wobble is just a (probably) sinusoidal motion in one direction, say Y, while moving in the X direction.
Keep up please!