(astronomy, physics) Alternative form of massive compact halo object

plural of massive astrophysical compact halo object

plural of massive compact halo object

(astronomy, physics) Any kind of astronomical body comprising normal baryonic matter that in sufficient numbers might explain the apparent presence of dark matter in galaxy halos.

plural of special master

(UK, US, law) An authority appointed by a judge to make sure that judicial orders are actually followed.

Alternative form of harbourmaster

One who has an extremely high level of ability or knowledge within an area of achievement or expertise. / (Freemasonry) Someone who has previously been a master at a given lodge.

Alternative form of past master

(physics) A mass of fissile material that is more than sufficient to sustain a nuclear chain reaction