acer (n.)

maple tree genus, from Latin acer, of uncertain origin, perhaps from PIE *ak- "be sharp" (see acro-) and so called for its pointed leaves. There seem to have been two roots for "maple" in Indo-European; cognates of this one are said to include Old High German ahorn "maple," and there is a similar form in Greek akastos "maple," perhaps also Hittite hiqqar- "maple." De Vaan writes, "This may well be a non-PIE tree name which was borrowed into Greek and Latin."

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Definitions of acer from WordNet

Acer (n.)
type genus of the Aceraceae; trees or shrubs having winged fruit;
Synonyms: genus Acer