BROWSE ENGLISH
BROWSE THESAURUS
BROWSE MEDICAL
BROWSE LEGAL
WORD OF THE DAY
MORE
WORD OF THE DAY

Facebook Twitter YouTube Instagram

dictionary thesaurus

BROWSE ENGLISH
BROWSE THESAURUS
BROWSE MEDICAL
BROWSE LEGAL

Follow: Facebook Twitter YouTube Instagram

ID₅₀

symbol

Medical Definition of ID₅₀

—used for the dose of an infectious organism required to produce infection in 50 percent of the experimental subjects

WORD OF THE DAY

apologia

play

See Definitions and Examples

Get Word of the Day daily email!

Dictionary Webster

Learn a new word every day. Delivered to your inbox!

Browse the Dictionary:
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
0-9

Home
About Us
Contact Us
Law Dictionary
Medical Dictionary
Privacy Policy
Terms of Use
Disclaimer

Browse the Thesaurus
Browse the Medical Dictionary
Browse the Legal Dictionary

© 2025 DictionaryWebster - Developed by CodeGenius

This product uses the merrriam-webster official public API