AM

This disambiguation page lists articles associated with the same or a similar title.

• Am (length) [r]: A submultiple of the SI base unit of length, viz., the metre, equal to 10^-18 metres; 1 metre consists of 10¹⁸ attometres. ^[e]
• Am (time) [r]: ante meridian, or before noon, time before midday: a.m. ^[e]
• AM [r]: Changing the height of the peaks of a periodic waveform, such as a radio wave, to carry information. ^[e]