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"El laboratorio" is a form of "laboratorio", a noun which is often translated as "laboratory". "Los viernes" is a form of "los viernes", a phrase which is often translated as "Fridays". Learn more about the difference between "el laboratorio" and "los viernes" below.
el laboratorio(
lah
-
boh
-
rah
-
toh
-
ryoh
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
1. (general)
a. laboratory
La vacuna se produjo en el laboratorio de investigación de la empresa.The vaccine was developed in the company's research laboratory.
los viernes(
lohs
byehr
-
nehs
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. Fridays
Me encantan los viernes porque no tengo que madrugar al día siguiente.I love Fridays because I don't have to get up early the next day.
b. the Fridays
Siempre trato de dejar los viernes que no trabajo libres para ir al cine.I always try to keep the Fridays I don't have to work free so I can go to the movies.
a. on Fridays
Marta y yo solemos quedar los viernes para tomar algo.Marta and I usually meet on Fridays to go for a drink.
c. Fridays
Los viernes trabajo de noche. ¿Nos vemos un sábado?Fridays I work nights. Shall we meet on a Saturday?