An example of an alder is a plant in the birch family.
Origin of alder
- Middle English from Old English alor
From American Heritage Dictionary of the English Language, 5th Edition
- Middle English alder, aller, from Old English alor, from Proto-Germanic *aluz, *alusō (compare Swedish al, East Frisian ällerboom), variant of *alizō, *alisō (compare Dutch els, German Erle), from Proto-Indo-European *h₂élisos (compare Hittite [script?] (alanza(n)), Latin alnus, Latvian àlksnis, Polish olcha, Albanian halë 'black pine', Ancient Macedonian (Hesychius) άλιχα (álicha, “white poplar”)