مَبْدَأٌ
1.
[originally noun of place and of time from 1; A place, and a time, of beginning, &c.
2.
] See بَدْأَةٌ.
3.
[Also A principle, or first rule, of a science &c.: plural مَبَادِيءُ.
4.
And The primary import of a word; opposed in this sense to غَايَةٌ.]