What Google Knows
Malus is a genus of about 30–55 species of small deciduous trees or shrubs in the family Rosaceae, including the domesticated orchard apple, crab apples and wild apples.
The genus is native to the temperate zone of the Northern Hemisphere.
n (Cockney rhyming slang) Stairs. Clipping of apples and pears.
n (Australia, Australian rhyming slang) Nice, fine.
n (slang) Testicles.