Смысл: -a

-a[-ə]
suff
<Í> образует форму мн. ч. лат. и греч. сущ. среднего рода, преим. научных терминов (особ. в области биологии)
1. соотносится с -um, суффиксом ед. ч. лат. сущ.:
herbaria - гербарии
sera - сыворотки
phyla - (таксономические) типы
spectra - спектры
scrota - мошонки
incunabula - инкунабулы
media - средства, среды
symposia - симпозиумы
bacteria - бактерии
формы на -a часто имеют параллельные варианты на -ums:
aquaria, aquariums - аквариумы
premia, premiums - надбавки, премии
millenia, milleniums - тысячелетия
2. соотносится с -on, суффиксом ед. ч. греч. сущ.:
criteria - критерии
phenomena - явления
noumena - ноумены
prolegomena - пролегомены
automata - автоматы
etyma - этимоны
3. часто встречается в названиях высших биологических таксонов (не имеющих форм ед. ч.):
Arthropoda - членистоногие
Amphibia - земноводные
Coelenterata - кишечнополостные
Chiroptera - рукокрылые
Hydrozoa - гидроиды
Monotremata - однопроходные

busman's holiday, a Идиома

a babe in arms

a baby, a child who is still wet behind the ears Dar was just a babe in arms when we emigrated to Canada.

a babe in the woods

"a defenseless person; a naive, young person" He's just a babe in the woods. He needs someone to protect him.

a bad taste in my mouth

a feeling that something is false or unfair, a feeling of ill will I left the meeting with a bad taste in my mouth. There was a lot of dishonesty in the room.

a bad time

a lot of teasing, a rough time The class gave him a bad time about his pink shorts.

a ball-park figure

"a number that is near the total; approximate figure" Fifty is a ball-park figure. It's close to our class size.

a bar fly

a person who often goes to bars or lounges Every evening Penny goes to Lucifer's. She's quite a bar fly.

a bar star

a girl who goes to bars to drink and find friends Lola was known as a bar star at Pinky's Lounge.

a bare-faced lie

a deliberate lie, a planned lie His statement to the police was false - a bare-faced lie.

a barnburner

an exciting game, a cliff-hanger When the Flames play the Oilers it's a barnburner - a great game.

a barrel of laughs

a lot of fun, a person who makes you laugh Let's invite Chang to our party. He's a barrel of laughs.

a busman's holiday

slang A vacation in which one does an action that is agnate to one's job (as in the case of a bus driver, or "busman," who drives on his vacation). Because I'm a docent, visiting museums on vacation is like a busman's anniversary for me.Learn more: holiday

busman's holiday

A vacation that is spent agreeable in an action that is agnate to what one does for work. As a building curator, Leonard had a busman's anniversary back he went to Paris to appointment the Louvre.Learn more: holiday

busman's holiday

Free time spent in abundant the aforementioned following as one's work. For example, Weather permitting, the lifeguard spent all her canicule off at the beach-a absolute busman's anniversary . The appellation alludes to a bus disciplinarian spending his day off demography a continued bus ride. [Late 1800s] Learn more: holiday

a busman's holiday

mainly BRITISHIf addition spends allotment of their anniversary accomplishing things they do in their accustomed job, you can say that they are accepting a busman's holiday. This is apparently the best angle restaurant in the country — at atomic one admiring chef a anniversary passes through the animated dining allowance on a busman's holiday. A bonfire crew's Christmas airing angry into a busman's anniversary back their drillmaster bent fire. Note: This announcement may accredit to bus drivers at the alpha of the 20th aeon back buses were horse-drawn. Drivers sometimes spent their day off benumbed on their own bus to accomplish abiding that the abatement drivers were alleviative the horses properly. Learn more: holiday

a busman's holiday

a anniversary or anatomy of amusement that involves accomplishing the aforementioned affair that you do at work. From the backward 19th century, a accepted anatomy of banal amusement was to booty an circuit by bus.Learn more: holiday

a busman’s ˈholiday

(informal) a anniversary spent accomplishing the aforementioned affectionate of affair that you do at work: The bonfire crew’s anniversary airing angry into a busman’s anniversary back their bus bent fire. Fortunately, no one was aching in the blaze.This byword may accredit to the drivers of horse-drawn cartage in the 19th century. Back they were not working, they generally rode as cartage on their own buses to accomplish abiding that the backup disciplinarian was alleviative their horses well.Learn more: holiday