Definition of protostome in English:
A multicellular organism whose mouth develops from a primary embryonic opening, such as an annelid, mollusk, or arthropod.
- These animals are all protostomes - the mouth develops before the anus in the young embryo - and they have long been recognized as belonging together as a group.
- In the complementary category, the protostomes, which includes annelids and arthropods, the blastopore develops into the mouth.
- Arthropods are bilaterally symmetrical protostomes with strongly segmented bodies.
Definition of protostome in:
- British & World English dictionary
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.
Most popular in the US
Most popular in the UK
Most popular in Australia
Most popular in Malaysia
Most popular in India
Most popular in Pakistan