Množina: alders

ETYM Old Eng. aldir, aller, from AS. alr, aler, alor, akin to Dutch els, German erle, Icel. erlir, erli, Swed. al, Dan. elle, el, Latin alnus, and Eng. elm.
Any tree or shrub of the genus Alnus, in the birch family Betulaceae, found mainly in cooler parts of the northern hemisphere and characterized by toothed leaves and catkins.
Sitka alder A. sinuata and red alder A. rubra are common to W North America.
1. North temperate shrubs or trees having toothed leaves and conelike fruit; bark is used in tanning and dyeing and the rot-resistant wood; SYN. alder tree.
2. Wood of any of various alder trees; resistant to underwater rot; used for bridges etc.

Množina: aldermen

ETYM as. aldormon, ealdorman; ealdor an elder + man. Related to Elder.
(Irregular plural: aldermen).
A member of a municipal legislative body (as a city council).
Anglo-Saxon term for the noble governor of a shire; after the Norman Conquest the office was replaced with that of sheriff. From the 19th century aldermen were the senior members of the borough or county councils in England and Wales, elected by the other councillors, until the abolition of the office 1974; the title is still used in the City of London, and for members of a municipal corporation in certain towns in the us.