From raphe + -less. <span class="searchmatch">rapheless</span> (not comparable) Describing the valve of a monoraphid diatom that does not have a raphe...
From pseudo- + raphe. pseudoraphe (plural pseudoraphes) The part of a <span class="searchmatch">rapheless</span> valve of a diatom that corresponds to a raphe...
From mono- + raphid. monoraphid (plural monoraphids) Any pennate diatom that has a raphe on only one valve <span class="searchmatch">rapheless</span>...
dysraphism monoraphid perineal raphe pseudoraphe pterygomandibular raphe <span class="searchmatch">rapheless</span> raphe nucleus raphe pallidus raphespinal Translations “raphe”, in Lexico...