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altostratus
altricial
altruism
ALU
alu
alu sequence family
alula
alum (1)
alum (2)
alumina
aluminate
aluminiferous
aluminise
aluminium
aluminize
aluminosilicate
aluminosis
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alto-

alto- or alti-


prefix 
Definition:
 
high, altitude
altocumulus, altimeter

[< Latin altus "high, deep" < Indo-European, "grow"]
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