Nadeliger
Nadeliger is an adjective used in Dutch and some Germanic-language scientific writing to describe something that is needle-shaped or more needle-like than another form. The root is typically linked to naald, the Dutch word for needle, and the suffixes -ig or -iger that form descriptive adjectives indicating a degree of similarity or form. In practice, nadelig or nadelförmig variants may appear in German-language texts, but nadelig is a separate word with a different meaning; the exact spelling and usage can vary by language and context. When translating or adapting to English, the common technical equivalent is acicular, used across disciplines to denote needle-like crystals, structures, or leaves.
In scientific contexts, nadeler or nadeliger usage may describe morphological features such as needle-like leaves in
See also: acicular, needle-shaped, needle leaf, conifer leaves, crystal habit.