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The symbol for americium.

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2013 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
abbr.
Bible
Amos

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2013 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
abbr.
1. America
2. American

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2013 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
abbr.
1. airmail
2. amplitude modulation
3. or AM Latin anno mundi (in the year of the world)
4. or AM or am ante meridiem
5. Latin artium magister (Master of Arts)

Usage Note: By convention, 12 AM denotes midnight and 12 PM denotes noon. Because of the potential for confusion, it is advisable to use 12 noon and 12 midnight.

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2013 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
am (ăm)
Share: am
v.
First person singular present indicative of be.

[Middle English, from Old English eom; see es- in Indo-European roots.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2013 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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