From the Latin name “apex (apic)” which means
“tip, point, top, extreme end” + "ulus (ul)"
the Latin dimutive substantive suffix for 1st & 2nd declension
nounssuffix and "atus" adjectival suffix for
nouns: possessive of or likeness of something (with, shaped, made)/
for verb participles: a completed action, -ed
( The specific name implies:
"abrupt short point").