Meteorite

Meteorological instrumentation

Meteorological optics

Meteorological radar

Meteorological rocket

Meteorological satellites

Meteorology

Methane

Methane on Mars

Methanogenesis

Methanol

Methicillin-resistant Staphylococcus aureus (MRSA)

Methicillin-resistant Staphylococcus aureus in the horse

Methods engineering

Metric system

Metzgeriales

Mica

Mice and rats

Micelle

Micro hydropower

Micro-electro-mechanical systems (MEMS)

Micro-opto-electro-mechanical systems

Micro-opto-electro-mechanical systems (MOEMS)

Micro-opto-mechanical systems (MOMS)

Microbial diversity in caves

Microbial ecology

Microbial forensics

Microbial fuel cell

Microbial interactions

Microbial survival mechanisms

Microbialite

Microbiology

Microbiome

Microcalorimetry

Microcline

Microcomputer

Microdialysis sampling

Microengineered hydrogels

Microfluidics

Micrognathozoa

Microlithography

Micromachined ultrasonic transducers

Micromanipulation

Micrometeorite

Micrometeorology

Micrometer

Micropaleontology

Microphone

Microprocessor

Micropygoida

Microradiography

MicroRNA

MicroRNA biogenesis pathway

MicroRNA-33 (miR-33)

Microsauria

Microscope

Microscopic calculations of heavy-ion fusion reactions

Microsensor

Microtechnique

Microtomography

Microwave

Microwave filter

Microwave free-field standards

Microwave impedance measurement

Microwave landing system (MLS)

Microwave measurements

Microwave noise standards

Microwave optics

Microwave organic synthesis

Microwave power measurement

Microwave solid-state devices

Microwave spectroscopy

Microwave tube

Mictacea

Mid-Oceanic Ridge

Middle East respiratory syndrome (MERS)

Middle-atmosphere dynamics

Midnight sun

Midrange wireless power transfer

Migmatite

Migratory behavior

Military aircraft of the 1980s

Military satellites

Milk

Milky Way Galaxy

Millerite

Millet

Mine mechanization

Mine seismology

Mineral

Mineral evolution

Mineral resource

Mineral textures in lavas

Mineralogy

Mineralogy of Mars

Miniaturized ion traps

Minimal principles

Minimal surfaces

Mining

Mining automation