one of the twelve divisions (calendar months) of the calendar year
2.
a period of time extending from one date to a corresponding date in the next calendar month
3.
a period of four weeks or of 30 days
4.
the period of time (tropical month) taken by the moon to return to the same longitude after one complete revolution around the earth; 27.321 58 days (approximately 27 days, 7 hours, 43 minutes, 4.5 seconds)
5.
the period of time (sidereal month) taken by the moon to make one complete revolution around the earth, measured between two successive conjunctions with a distant star; 27.321 66 days (approximately 27 days, 7 hours, 43 minutes, 11 seconds)
6. Also called: lunation
the period of time (lunar or synodic month) taken by the moon to make one complete revolution around the earth, measured betweentwo successive new moons; 29.530 59 days (approximately 29 days, 12 hours, 44 minutes, 3 seconds)
7. a month of Sundays
▶ Related adjective: mensal
Examples of 'mth' in a sentence
mth
There were no clinical or neurophysiological abnormalities at 6-9 mth.
Anjana Silva, Kalana Maduwage, Michael Sedgwick, Senaka Pilapitiya, Prasanna Weerawansa,Niroshana J Dahanayaka, Nicholas A Buckley, Christopher Johnston, Sisira Siribaddana,Geoffrey K Isbister 2016, 'Neuromuscular Effects of Common Krait (Bungarus caeruleus) Envenoming in Sri Lanka.',PLoS Neglected Tropical Diseaseshttp://europepmc.org/articles/PMC4734751?pdf=render. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)