You can use:
select *
from
sys.procedures
where
name like '%name_of_proc%'
if you need the code you can look in the syscomments table
select text
from
syscomments c
inner join sys.procedures p on p.object_id = c.object_id
where
p.name like '%name_of_proc%'
Edit Update:
you can can also use the ansi standard version
SELECT *
FROM
INFORMATION_SCHEMA.ROUTINES
WHERE
ROUTINE_NAME LIKE '%name_of_proc%'
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