You searched for: “m
ad- appears in this form before a vowel and before the consonants d, h, j, m, and v. It is simplified to a- before sc, sp and st.

Before c, f, g, l, n, p, q, r, s, and t; ad- is changed to ac-, af-, ag-, al-, an-, ap-, aq-, ar-, as-, and at-.

In other words, the d of ad usually changes into the same letter as the first letter of the following root or word when it is a consonant: ad-fix becomes affix, and ad-sign becomes assign; therefore, making a double consonant.

Another example includes: attract as with ad-tract (drawn towards); so it has a double t. On the other hand when ad- precedes a vowel, as with adapt, it is simply ad-apt, with one d. For the same reason, there is only one d in adore and adumbrate, because ad- has combined with orare and umbra each of which starts with a vowel.

So, remember: since these Latin words begin with vowels and not consonants, the d of ad does not double as shown in the previous examples.

This entry is located in the following unit: Latin Proverbs, Mottoes, Phrases, and Words: Group A (page 6)
meridies, m.
Noon, middle of the day.
This entry is located in the following unit: Latin Proverbs, Mottoes, Phrases, and Words: Group M (page 3)
mille, m.
A thousand.
This entry is located in the following unit: Latin Proverbs, Mottoes, Phrases, and Words: Group M (page 3)
volt per meter, V/m
The Système International [d'Unités] (International System [of Units]) derived unit of electric field strength; 1 volt/1 meter = 1 newton/1 coulomb.
This entry is located in the following unit: volt + (page 4)
A unit related to: “m
(lists of "M" sections that are organized into what for some people are confusing groups of words)
Word Entries at Get Words: “m
absolute magnitude, M
1. The magnitude a celestial object would appear to have if it were at a distance of ten parsecs (10 times 3.261633 light years or 32.62 parsecs).
2. A measure of the true or intrinsic brightness of a star as if all stars were the same distance (32.6 light-years) from the observer.
This entry is located in the following unit: Astronomy and related astronomical terms (page 1)