Aciculum - definition of aciculum by The Free Dictionary
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, pl -lums or -la
(Zoology) a needle-like bristle that provides internal support for the appendages (chaetae) of some polychaete worms
[C19: New Latin; see acicula]
References in periodicals archive
Diagnosis: There is a subdistal row of small denticles on the aciculum and the pharynx has 6 teeth and 2 lateral plates.
There were 3 aciculae in anterior parapodia and 2 in mid-body parapodia; a needle-like aciculum accompanied these thicker acicula in all setigers.
music-mad W2 (2) Caesium musicale Calcium calumbic aciculum