well-formed

[ wel-fawrmd ]

/ ˈwɛlˈfɔrmd /

rightly or pleasingly formed: a well-formed contour.

Linguistics. (of an utterance) conforming to the rules of a language; grammatical (opposed to ill-formed).

Origin of well-formed

First recorded in 1510–20

well-form·ed·ness

[wel-fawr-mid-nis, -fawrmd-] /ˈwɛlˈfɔr mɪd nɪs, -ˈfɔrmd-/, noun

I gave some examples of bad design and showed a picture of an infant with a well-formed tail to illustrate one example.

The Crazy Way Creationists Try To Explain Human Tails Without Evolution |Karl W. Giberson |June 1, 2014 |DAILY BEAST
It will be seen that the shell is round, with a well-formed spiral.

The Sea Shore |William S. Furneaux
With the exception of the second toe of the hind-foot, the digits have well-formed, flattened nails as in the majority of monkeys.

Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 4 |Various
She was of a dark chestnut color, well-formed, with a large and high forehead, indicative of intellect.

The Underground Railroad |William Still

His face was well-formed, except that the nose was too large and too prominently aquiline.

Shoulder-Straps |Henry Morford
In person, Monroe was tall and well-formed, with light complexion and blue eyes.

Hidden Treasures |Harry A. Lewis

well-formed

logic linguistics (of a formula, expression, etc) constructed in accordance with the syntactic rules of a particular system; grammatically correct

well-formedness, noun